Hydrofluorocarbon
= HFC
? 同義詞
??? 情景例句
Is smoking allowed on the train?
火車上允許吸煙嗎？
Yesterday was such a beautiful day we decided to go for a drive.
昨天是如此美好的一天，我們決定開車出去。
Thank you, doctor, said Mrs. Brown.
“謝謝你，醫(yī)生，”布朗夫人說。