| [/ɑːk; ɑrk/] n 用法:
1 part of the circumference of a circle or some other curved line 弧（圆周或其它曲线的一部分）. =>illus at circle 见circle之插图. 用法:
2 thing with this shape 弧形物:
the arc of a rainbow 虹的弧形. 用法:
3 luminous electric current passing across a gap between two terminals 电弧; 弧光. arc 2
v (pt, pp arced [/ɑːkt; ɑrkt/], pres p arcing[/ˈɑːkɪŋ; ˋɑrkɪŋ/]) [I] form an electric arc 形成电弧; 产生弧光. |