Polyalkane
聚链烷
🗣️ 情景例句
But I've never had the pleasure of doing any business with you.
可是同贵公司尚无业务往来。
The surest way to be happy is to be busy.
要快乐，最可靠的办法是忙碌。
German is a more difficult language than English is.
德语比英语难学。