tensing

例句:

• This exercise is fine for tensing up little - used muscles.
  这项运动有助于锻炼那些不常使用的肌肉.
  
• Tense the rope manually before tensing the spring.
  要想使弹簧有弹力,就手工拉紧绳索.
  
• All my muscles were tensing for a fight.
  我浑身的肌肉都绷紧了,准备进行一场搏击.
  
• The large Gordo head began to shake back and forth, cheek muscles tensing.
  来自THETIMES
• "Very, very angry," he said, his jaw tensing as he glanced at the photos on his phone.
  来自BBC
• Some of the ways is through force like biting on an object, tensing up really tightly, or swearing.
  来自SA