柯林斯詞典arc /ɑ?k/ (arcs) 1. N-COUNT An arc is a smoothly curving line or movement. 弧線; 弧線運(yùn)動(dòng) The helicopter made a slow arc, passing over the mound but not stopping. 這架直陞飛機(jī)做了一個(gè)緩慢的弧線運(yùn)行，飛過那座小丘，但沒停下來。2. N-COUNT In geometry, an arc is a part of the line that forms the outside of a circle. 弧[技術(shù)] 返回 arc劍橋詞典 arc noun [C] (CURVE) the shape of part of a circle , or other curved line ?。换睿换【€；弧形 The ball rose in a high arc and fell behind the boundary line . 球在空中高高地劃了一條弧線落在邊線外。 arc noun [C] (ELECTRICITY) a powerful flow of electricity that goes across a space between two points 電弧，弧光 返回 arc