Preconcentrator
[化] 预浓缩器
🗣️ 情景例句
Workers have to work very hard to keep bread on the table.
工人得十分努力工作才能赚钱糊口。
Second thoughts are best.
三思而行，再思可也。
If you make a mistake on the form, just cross it out.
如果填表出了错，划掉即可。