1. The doctor told her to spend a few minutes crooking and uncrooking her fingers, several times a day, in order to keep the arthritic joints as supple as possible. 
   医生要她每天数次用几分钟时间弯曲和舒展手指，以尽量使发炎的关节保持柔软。

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• 1. 弯曲
  critical velocity 临界速度...crooking 弯曲...crooked green wood 弯曲鲜材
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