Preconcentrator
[化] 预浓缩器
🗣️ 情景例句
You can certainly design dresses.
确实很能设计服装。
If you have any questions on the details， feel free to ask.
如果对某些细节有意见的话，请提出来。
When we talk about the universe, we mean the earth, the sun, the moon and the stars, and the space between them.
人们谈论宇宙时，是指地球、太阳、月亮、星星以及它们存在的空间。