Perhalogenomethane
全卤甲烷
🗣️ 情景例句
May I have a bus map, please?
请给我一份公共汽车路线图好吗？
We have new methods like compensation trade and joint ventrue.
我们有补偿贸易和合资经营。
I felt very nervous when I went into his office.
我走进他的办公室，感到非常紧张。