radius
radius
[ˈreɪdɪəs]
(pl. radii -dɪʌɪ 或者 radiuses)
[ˈreɪdɪəs]
(pl. radii -dɪʌɪ 或者 radiuses)
- a straight line from the centre to the circumference of a circle or sphere
半径
■a radial line from the focus to any point of a curve
辐射距离
■the length of the radius of a circle or sphere
半径距离
■a specified distance from a centre in all directions
（指明的）半径范围
there are plenty of local pubs within a two-mile radius.
在两英里范围内有许多本地酒馆。 - (Anatomy)the thicker and shorter of the two bones in the human forearm
(剖)桡骨。 比较ulna
■(Zoology)the corresponding bone in a vertebrate's foreleg or a bird's wing
(动)（脊椎动物前肢或鸟翅的）桡骨
■(Zoology)(in an echinoderm or coelenterate) any of the primary axes of radial symmetry
(动)（棘皮动物或腔肠动物的）辐射对称轴
■(Entomology)any of the main veins in an insect's wing
(昆)径脉
- [with obj.][often as adj. radiused]give a rounded form to (a corner or edge)
使（角，边缘）成弧形
- late 16th cent. (in sense 2): from Latin, literally staff, spoke, ray'
考试词汇表
