Chlorotrifluoromethane
[机] 氯三氟甲烷
🗣️ 情景例句
Do I need a visa to go to HongKong?
去香港需要签证吗？
I know the boy whose father is a missionary.
我知道那个男孩的父亲是传教士。
She finished it at half past nine. She went to bed before a quarter to ten.
30 她完成了作业。她9：45之前上床睡觉。