Polyfluorination
多氟化反应
🗣️ 情景例句
Ten o'clock,
十点钟，
I sometimes stay up till midnight.
我有时候熬到半夜。[一般现在时]
The skins were used for making tents and water containers.
还可以用野牛皮制作帐蓬和装水的容器。