Rackwork
齿条, 齿条加工, 齿条机构
🗣️ 情景例句
The pleasure is all mine.
这是我的荣幸。
I asked him to buy it for me, but he wouldn't.
我请他帮我买，但是他不肯。
In a heat wave we choose a midnight birthday party and that is the most exciting of all.
天气炎热时，我们便选择在半夜举办生日聚会，这种聚会是最令人激动的。