Pregrouting
预灌浆
🗣️ 情景例句
My instructor thought that the beginner's class was too easy for me.
老师认为初级课程对我来说太容易了。
A chain is no stronger than its weakest link.
链条的坚固程度取决于它最薄弱的环节。
Do we have to wear the helmets?
我们得戴上防护帽吗？