Purification agent
[化] 油田水净化剂
🧩 词语组成解析
purification
[ˌpjuərifi'keiʃən]
n. 洗净;涤罪;提纯;（犹太妇女按教规在月经后行的）洁净礼;
🗣️ 情景例句
I have a call to make.
我需要打个电话。
What time is it now?
现在几点？
The further off this solid obstruction, the longer time will elapse for the return of the echo.
固体障碍物越远。回声返回所用时间就越长。