T.u.c
职工大会
🗣️ 情景例句
What a pleasant surprise running into you.
碰见你真是太棒了！
He deserves not the sweet that will not taste the sour.
吃过苦头，才配享受。
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。