Mmm
[ [m] ]
初中 Junior High
[医] 毫微米
🗣️ 情景例句
Thanks, Grandpa.
谢谢你， 爷爷。
I think you're mistaken about that.
我想你那样不对。
below 20 per cent, its bactericidal action is negligible.
浓度低于20％时，杀菌能力基本上就不存在了。