n.综合症状;弧(度);天穹;电弧,弧光。;
vi.形成拱状物;循弧线行进;
abbr.American Red Cross. 美国红十字会;
例句:
A perpendicular bisector of a chord passes through the centre and bisects the arc.
弦的垂直平分线经过圆心,并且平分弦所对的两条弧.
May I see your ARC and passport please?
我可以看你的工作证及护照 吗 ?
The purification of single-walled carbon nanotubes ( SWNTs ) synthesized by a hydrogen arc-discharge method was investigated.
针对半连续氢电弧法制备的 单壁纳米碳管 提出了一种纯化方法.