action part的用法和樣例：
例句
- More than half of the heads of poor families work at least part time.
貧困家庭人口中有一半以上只工作部分時間。 - Additionally, the shell is fixed on its pedestal with bolts, when the machine is running, the working part is covered with a mantle.
另外，把外殼用螺釘固定在底座上，在機器工作的時候，再用一個罩子把機器的工作部分罩起來。
