Camming
凸轮系统
🗣️ 情景例句
He ventured his life to rescue a drowning child.
他冒着生命危险去抢救一个溺水的孩子。
Apothecaries would not sugar their pills unless they were bitter.
好药不苦不会加糖衣。
I'm very proud of you.
我为你感到非常骄傲。