pedal arm

例句：

1. 1.The pedal arm on the bicycle is designed to allow you to adjust the brakes easily.
   自行车的脚踏臂设计成让你可以轻松调整刹车。
2. 2. The engineer adjusted the pedal arm to improve the efficiency of the machine.
   工程师调整了脚踏臂以提高机器的效率。
3. 3.The pedal arm was damaged during the accident and had to be replaced.
   事故中损坏了脚踏臂，不得不更换。