| 释义 |
arc CURVEHB:k, $B:rkn [C](the shape of) part of a circle, or other curved line弧；拱The crowd watched as the ball rose in a high arc and fell behind the boundary line.观众望着那球高高地划成一道弧线，落到边线后。They dug out the soil in an arc stretching about 4 metres from the wall.他们在墙边约4米长的弧线内把土挖了出来。The agricultural land spreading out in a 100-mile arc from the city is extremely fertile.从该城向外延伸的100英里弧形区域内，农田都是非常肥沃的。
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