Stricturoscope
直肠狭窄镜
🗣️ 情景例句
The old library building on Chestnut Street,
Chestnut街老图书馆，
Which one is more clever?
哪一个是较聪明的？
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。