Preconcentrator
[化] 预浓缩器
🗣️ 情景例句
If you ask me, it's too early to go home.
如果你问我，（我会说）现在回家还太早。
We have adopted much more flexible methods in our dealings.
我们在具体操作方法上灵活多了。
No. It has nothing to do with it at all.
没有。它和我的研究一点关系都没有。