a shot in the arm

• n. 麻醉皮下注射；兴奋剂；刺激因素

例句

用作名词 (n.)

1. Your encouraging words were a real shot in the arm.
   你对我的鼓励真是一针兴奋剂。
2. There wasn't that much fighting in the lunches.
   午饭时也有战斗，他们是很好的兴奋剂。
3. It was then countered with the biggest stimulus in history.
   然后以史上最大的刺激因素对其进行了反击。