Librarain
n. 图书馆员
🗣️ 情景例句
and do it while I talk to my secretary.
我去和秘书说个话。
Have a nice Thanksgiving!
感恩节快乐！
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。