Rackwork
齿条, 齿条加工, 齿条机构
🗣️ 情景例句
Would you get me some more water, please?
麻烦你再帮我加点水，行吗？
Whom will you go out with?
你将和谁出去？
Some children can cover the whole length of the pool without coming up for breath even once.
有些孩子能够跑完游泳池的全长而不用露出水面换气。