Chronic altitude sickness
[医] 慢性高空病
🧩 词语组成解析
🗣️ 情景例句
No. I really don't know how to go about it.
没有。我真不知道如何填。
It seems he's afraid.
看起来他好像很害怕。
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。