| 单词 | 旋球 |
| 释义 | 〔undercut〕A spin given to a ball opposite to its direction of flight; a backspin.旋球：与球飞进方向相反的旋转；逆旋转〔undercut〕To impart backspin to (a ball) by striking downward as well as forward, as in golf and baseball.用下旋手法击（对手）：在高尔夫或棒球中向下或向前击球以制造逆旋球 |
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