Sym-tetrachlorodifluoroethane
[建] 对称-四氯二氟乙烷
🧩 词语组成解析
[计] 符号, 系统, 制
🗣️ 情景例句
I read Guangzhou Daily on my way to work in the morning.
早上上班的路上我总是读《广州日报》。
How many feet are you going to use?
你要用几英尺？
I beg your pardon.
请你原谅。