clench

vt.

紧握，抓紧；钉牢；[航海] 系紧：用绳结捆绑；

n.

抓紧，咬紧；抓紧用具；

过去式：clenched过去分词：clenched现在分词：clenching第三人称单数：clenches

1. You walk in circles, kick the ground, clench your fists and throw your arms in the air.
   你绕圈走着，脚踢地面，紧握拳头，在空中挥舞着手臂。

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