Hydrofluoric
a. 氢氟酸的
🗣️ 情景例句
in the children's ward.
在小儿科病房那边。
If you run after two heares, you will catch neither.
两头落空。
Good afternoon! I am. Today is 16th of December, 1995. Everybody is here except Jim Green.
下午好！今天我值日。今天是（星期和日期）。除了吉姆·格林外，所有人都到齐了。