helium

helium

1. Helium, cesium, and rubidium were discovered in the mid-19th century by spectroscopy of the sun's spectrum.

19世纪中叶用光谱技术分析太阳光谱而发现了氦、铯和铷。

2. The Apollo Lunar Excursion Module Descent Engine (LMDE) is helium pressure-fed with the throttling ratio of 10:1 and a multi-startup capability.

“阿波罗”飞船登月舱下降发动机（LMDE），采用氦气挤压式供应系统，推力变比10：1，并能多次起动。

3. A dense core of incandescent helium is surrounded by a thin shell of hot, fusing hydrogen.

一个由白炽的氦形成的稠密的核外面包围着一层炽热熔化的氢薄壳。

4. The force between a pair of helium atoms is so weak that helium does not solidify at all.

一对氦原子之间的作用力微弱得使氦根本不能固化。

5. The chip can be cooled with liquid nitrogen or even liquid helium, but this requirement complicates the apparatus considerably.

一种是利用液态氮或液态氦来冷却晶片，但这会让仪器变得复杂许多。

6. To take place. In this reaction, three helium nuclei will fuse together to form a carbon nucleus.

为止,即把三颗氦原子核结合为一颗碳原子核。

7. Humans possess no senses that can detect the presence of helium.

人类没有能够探测到氦的存在的官能。

8. Preliminary investigations of samples from Graphite Peak indicate that fullerenes are present and contain extraterrestrial helium and argon.

从南极石墨峰采集的标本，初步研究的结果显示其中藏有外太空的氦与氩。

9. They also discovered that the helium in the balloons would last for six hours.

他们也发现汽球中的氦气有效时限可达六小时。

10. He tied them to a lawn chair and filled them with helium.

他将气球绑在折椅上并注入氦气。

11. Packed with 105 helium balloons, a GPS device, water and some snacks, Kent Couch made lift-off.

他带上105个氦气球，一个全球定位系统仪，一些小吃和饮料开始了他的旅程。

12. Hajji, of Hackney, east London, had concealed a $12,000 engagement ring inside a helium balloon.

他本来想，等向女朋友求婚的时候，让她戳破气球后，戒指再“现身”。

13. He plans to circumnavigate the world in a helium balloon.

他计画搭乘氦气球环绕世界一周。

14. Sulphar and chlorine in industrial circulate water were determined by XRF with the spectrum pure reagent,in helium light way.

以光谱纯试剂做标准系列,氦气光路,XRF法测定工业循环水中硫和氯。

15. A maximum acoustic power 43.1 W output to RC load of 110 cm~3 capacitance was measured with helium filling of 2.1 MPa and heating power of 2 000 W.

以氦气为工质,在充气压力2.1 MPa、加热功率2 000 W的条件下,采用110 cm3的气库,在1台驻波型热声发动机上获得了最大43.1 W的声功率输出。

16. You tie a helium balloon to your head and hope it acts like a mana shield.

你将一个氦气球系在头上，指望它能起魔法护罩的作用。

17. You can be a helium hea without even trying.

你真是个大傻瓜，甚至连试都不试一下。

18. For instance, the Large Hadron Collider (LHC) at CERN in Switzerland uses helium as a coolant.

例如,位于瑞典的欧洲核子研究中心大型强子对撞机即用氦做为冷却剂。

19. Helium produced in the early universe, for example, makes up about 24 percent of the total matter.

例如，在早期宇宙所产生的氦，约佔了所有物质的24%。

20. Cloaked in a thick haze of hydrogen and helium, the planet is streaked by 1500-m.p.h. winds that push clouds of frozen methane.

厚厚地裹着一层雾状的氢和氦，这颗行星遭受每小时一千五百英里强风的鞭挞，滚动着一团团冰冻的甲烷。

21. The antimatter equivalent of helium.

反氦与氦等价的反物质

22. Another possibility is that the crystal of helium contains numerous defects and lattice vacancies (yet another effect of the zero-point motion).

另一种可能是氦的晶体中有许多缺陷和晶格空位（也是零点运动所造成的）。

23. The remaining 114 tons of liquid helium in the collider was unaffected by the leak, said Gillies.

吉利斯说，对撞机中的其余 114 吨液态氦没有受到这次泄漏的影响。

24. The hazards associated with helium are asphyxiation and the high pressure of the gas in containers and systems.

同氦相联系的危险是窒息和在容器和系统里的高压。

25. Humidified helium replaced oxygen to prevent further erosion, and the glass was filtered to cut down on light exposure.

含湿氦气替代氧气以防进一步腐蚀，玻璃进行了滤光处理，以减少光照影响。

26. Similar to other main sequence stars, hydrogen nuclei will be fused to helium nuclei in the core.

和其他恒星一样,大质量恒星会在主序阶段把氢转化为氦。

27. So, it has an atmosphere of light-weight elements: hydrogen and helium.

因此，它的大气层由重量很轻的元素：氢和氦构成。

28. The image was recorded in extreme ultraviolet light emitted by ionized Helium, an element originally identified in the solar spectrum.

图像由电离氦喷发产生的超长紫外线光波记录得到，氦元素最初也是由太阳光谱而确认。

29. Many experiments were conducted in order to understand the physical phenomena and mechanism after a heat pulse was released in superfluid helium.

在以上的温度范围内进行实验，研究了在热脉冲作用下，发生在超流氦浴中的沸腾现象及其物理机制。

30. Reverse Brayton cycles of helium, the primary form of helium refrigeration, are widely used in cryogenic engineering.

在大量的科学研究和低温工程领域中，氦气制冷技术被广泛应用，逆布雷顿制冷循环则是其主要的循环制冷方法。

31. In my laboratory, helium sparging is the degassing technique of choice because it is simple and effective.

在我们实验室，用的是通氦脱气方式，因为它简单又有效。

32. The core meanwhile will reach a temperature of100 million degrees Kelvin, and the helium nuclei will begin fusing into carbon nuclei.

在此期间核心温度会达到1亿K，氦原子核将开始聚变成碳原子核。

33. In Gas Liquid Chromatography a mixture of vapors is carried in a stream of helium (carrier gas) through a column.

在气液色层分析中，蒸气的混合物由源源不断的氦气(载气)带入柱中。

34. After hydrogen, the atom with the simplest structure is that of helium.

在氢元素之后，氦的原子结构最简单。

35. Under Helium, tribological properties of material becomes worse and fluid lubrication can't be used.

在氦气环境中，材料的摩擦学性能一般要变差，而且很难采用流体润滑技术。

36. A carrier gas filter system is recommended to be installed on the Helium line (He).

在氦气管路前面建议安装气体净化装置。

37. Helium can provide a protective atmosphere in the production of reactive metals, such as titanium and zirconium.

在活泼金属，如钛和的锆生产中，氦可以提供保护性气氛。

38. It would not make sense to inject that much power into one point of the grid, and liquid helium is a cumbersome coolant.

在电力网的某个点，输入那麽大的电力没什麽意义，液态氦这种冷却剂也不容易处理。

39. Gaseous helium is used as an inert shielding gas in metal arc and laser welding.

在金属电弧和激光焊接中气态氦用作惰性屏蔽气体。

40. In a laser-powered plasma accelerator, an ultrashort laser pulse is focused into a helium jet that is a couple of millimeters long.

在雷射电浆加速器里，一个超短的雷射脉冲聚焦到一束大约两、三公厘长的氦喷射气流中。

41. A large helium or hot-air balloon constructed so as to resemble a figure or an object when inflated.

大型气球:大型的填充氦气或热气的气球,充满气后模拟某个形象或物体。

42. Most commercial helium is recovered from natural gas through a cryogenic separation process.

大多数商用氦是通过一种低温分离过程从天然气中回收的。

43. The atmospheric helium isotope ratio: Is it changing?

大气氦同位素比率在变化吗?

44. Most emission nebulae are about 90% hydrogen, with the remainder helium, oxygen, nitrogen, and other elements.

大部分的发射星云都有90%的氢，其馀的部份则是氦、氧、氮和其他的元素。

45. Astronomers ascribed them to thermonuclear fusion of hydrogen or helium or to the sudden accretion of matter onto the star.

天文学家因此可将其归因于氢或氦的热核融合反应，或是有物质突然被星体吸附而产生的。

46. The sun is made of masses of hot gases, and when the hydrogen in its center is changed into helium, a huge amount of heat is given off.

太阳是由热气团构成的，当其中心处的氢变成氨时，便放出大量热能。

47. If we have reached the Helium pressure the time T18 starts.

如果我们达到了氦气压力，时间T18就开始了。

48. For skin contact with cryogenic liquid helium, remove any clothing that may restrict circulation to the frozen area.

如果皮肤接触到低温液氦，脱掉任何可能限制冻伤区域血液循环的衣服。

49. It will quietly and steadily burn the hydrogen to helium and become a white dwarf.

它会稳定地把氢转化为氦,然后安静的死去,成为白矮星。

50. Helium is a monatomic chemically inert gas.

它是单原子惰性气体。

51. Its thick atmosphere contains eighty-four percent hydrogen and fifteen percent helium.

它那厚厚的大气层里包含了84%的氢和15%的氦。

52. The trapped amount of helium depends on the relative helium content in sputtering gas, applied bias and substrate temperature.

实验研究了薄膜中的氦含量与溅射真空室气氛中氦的相对含量、基底偏压及沉积温度间的关系。

53. Liquid helium ISO tanks may be removed from the trailer chassis for overseas shipments.

对于海外运输，液氦iso罐可以从拖车底座上移动下来。

54. Dry helium is the only acceptable gas for external pressurization of the liquid container.

对于液体容器的外部加压，干燥的氦气是唯一可以接受的气体。

55. For liquid hydrogen system, Helium purge is required after or before nitrogen purge.

对于液氢系统用氮气吹扫之后，还要用氦气吹扫。

56. Denser atomic materials followed in due course; first helium, via the Critchfield formula for H-H fusion, which can proceed in pur hydrogen.

将近360亿年以前,差不多比现代天体物理学推想的宇宙年龄长2倍,互相反射关系组合构成物质和反物质开始进入的成对宇宙，因此，定义为三维空间。

57. And change to pump helium. Helium is a thermogenic agent and can thaw those ice balls.

就改输氦气,氦气是一种致热原,它能把这个冰冻的冰球给融解

58. Although I don't recall the exact conditions being compared, Figure 1 shows that helium sparging is much more effective than vacuum degassing.

尽管我没有给出比较用的准确条件，图1显示了通氦脱气比真空脱气更有效。

59. Although helium is nontoxic and inert, it can act as a simple asphyxiant by displacing the oxygen in air to levels below that required to support life.

尽管氦无毒且不活泼，通过取代空气中的氧,使之下降到维持生命所必须的水平以下,它可以成为简单的窒息物。

60. The approximative calculation for the artificial helium molecule[J].

引用该论文 井孝功,赵永芳,康秀杰.

61. Application of metastable helium atomic beam in nanostructures fabrication[J].

引用该论文 陈献忠,姚汉民,陈旭南.

62. When the hydrogen in the shell, too, is exhausted, the star takes to fusing helium there.

当壳层中的氢也燃烧殆尽，恒星便开始融合氦。

63. The next element above hydrogen, as we go from the simplest to the most complicated element, is helium.

当我们以最简单到最复杂按顺序考查原子时，比氢复杂的其次一个元素就是氦。

64. When helium is cooled to very low temperatures, it forms an astonishing liquid.

当氦冷却到很低温度时，它会形成一种奇妙的液体。

65. When helium burning takes over the main burden of energy generation in the star, the core expands somewhat, and the envelope contracts somewhat.

当氦燃烧成为星体能量产生的主要来源时，核心略微膨胀，而包层略微收缩。

66. The helium valve is a safety feature, which, during the decompression phase, releases the gases that infiltrate into the watch during caisson dives.

当然不需要！为什麽？它只是挂在潜艇外面又不是接触到氦氧混合气干吗要排氦？

67. When a sunlike star exhausts its hydrogen fuel and then its helium, it turns to its carbon and oxygen.

当类似太阳的恒星接连用光了它的氢燃料及氦燃料后，便转而燃烧自身的碳与氧。

68. Nuclear reactions in such a star's core, the source of power for nearly its entire life, deplete the available hydrogen, then the helium.

恒星一生的能量来源，几乎都来自中心的核反应，过程中会耗尽所有可用的氢，然后是氦。

69. The carbon is created by helium fusion near the stellar core and dredged up into the stars' outer layers.

恒星核附近的氦融化之后，流到恒星的外表层就形成了碳。

70. All full-penetration joints shall be back purged with argon or helium.

所有全熔透焊接接头用氩或氦进行反吹。

71. All shipments of compressed helium must comply with DOT regulations.

所有压缩氦的运输必须遵守DOT的规定。

72. Technologists are now experimenting with cables cooled by liquid helium: the cables would become supercondutors and be able to carry far mare electricity.

技术人员正在用经液体氦冷却的电缆做实验：这种电缆将会成为超导体，能传送更多的电。

73. For an hour or so, the homemade silver foil or mylar-coated helium balloon floated high above the countryside in southern Colorado State.

持续约一个小时左右，一个自制的有银箔或涂上一层聚酯薄膜的氦气球高高地飘越科罗拉多州的南部。

74. Abstract: Two new methods using metastable helium atomic beam to fabricate nanostructures are introduced.

摘 要： 介绍两种用亚稳态氦原子束制作纳米结构的新方法。

75. Abstract： Superfluid helium is a unique cryogenic fluid,whose flowrate measurement is different from others.

摘 要： 超流氦是一种性质特殊的低温流体，其流量测量与一般流体有所不同。

76. Abstract Deuterium containing helium absorption of unsaturated uranium deuteride with different composition at varied initial pressure is studied.

摘要 研究了不同含氦量的混合气体、吸氘初始压力以及不同组成的不饱和氘化铀对铀吸氘行为的影响。

77. Deuterium containing helium absorption of unsaturated uranium deuteride with different composition at varied initial pressure is studied.

摘要研究了不同含氦量的混合气体、吸氘初始压力以及不同组成的不饱和氘化铀对铀吸氘行为的影响。

78. Detailed scheme of structure design of ITER helium cooled solid breeder (HCSB) test blanket module (TBM) has carried out.

摘要给出了中国ITER氦冷固体增殖剂(HCSB)实验包层模块(TBM)整体结构的初步设计。

79. Thousands of cubic metres of helium were pumped into the towering silver canopy of his balloon.

数千立方米的氦气被灌入高达几米的银色气球中。

80. Slick Smitty entered the annual forest marathon race with helium balloons tied to his body.

斯力克。斯密提参加了年度森林马拉松比赛,他把氦气球系在自己身上。