arc
arc
[ɑːk]
noun
[no obj.]
minute of arc
[ɑːk]
noun
- a part of a curve, especially a part of the circumference of a circle
弧
■a shape resembling this or something with such a shape
弧状物体
the huge arc of the sky.
茫茫苍穹。
■a curving trajectory
弧形射体轨道
he swung his torch in a wide arc.
他把手电筒拉着大圈子左右挥动。
■[as modifier](Mathematics)indicating the inverse of a trigonometrical function
(数)反三角函数 - a luminous electrical discharge between two electrodes or other points
电弧
[no obj.]
- [with adverbial of direction]move with a curving trajectory
循弧线运动
the ball arced across the room.
球以弧形路线飞过房间。 - [usu. as noun arcing]form an electric arc
形成电弧
check that switches operate properly with no sign of arcing.
检查一下开关是否使用正常，是否不带电弧。
minute of arc
- 见 minute (义项2)
- 见 second (义项2)
- late Middle English (denoting the path of a celestial object, especially the sun, from horizon to horizon): via Old French from Latin arcus 'bow, curve'
热门查询
- plumulaceous adj.关于绒羽（或胚芽）的，似绒羽（或胚芽）的
- plumulate adj.有漂亮羽毛的，羽毛华丽的
- plumule n.胚芽，胚茎,（小鸟的）绒羽,幼芽
- plumy adj.羽毛似的，用羽毛装饰的
- plunder vt.& vi.掠夺,偷,私吞 n.抢劫,掠夺物
- plunderage n.抢夺，掠夺
- plunderbund n.（商业、政治、金融等利益集团结成的剥削公众的）掠夺联盟
- plunderer n.掠夺者
- plunderous adj.劫掠的，掠夺成性的
- plunge vt.用力插入,使陷入 vi.跳入,全心投入,突降，俯冲 n.投入，陷入,游泳，跳水
- plunger n.手压皮碗泵,撞针杆,活塞,柱跳水者，潜水者
- plunging adj.跳进的，突进的 v.颠簸( plunge的现在分词 ),暴跌,骤降,突降
考试词汇表
