Rackwork
齿条, 齿条加工, 齿条机构
🗣️ 情景例句
Do you already have a boyfriend?
你已经有男朋友了吗？
Every salesman boasts of his own wares.
老王卖瓜，自卖自夸。
As soon as I tap on the window, you must stop within five feet.
我一敲车窗，你必须把车停在5英尺之内。