propleura

例句：

1. 1. She stretched her arms out to the side as she walked.
   她散步时伸展开双臂。
2. 2. The forearm muscles are responsible for supporting the hand and wrist.
   前臂肌肉负责支撑手和手腕。
3. 3. During the race, he swung his arms to keep up with the pace.
   比赛期间，他挥动手臂以跟上速度。