Monoprop
丙酸
🗣️ 情景例句
You look young for your age.
你比你的实际年龄年轻多了。
While you were writing letters,I was reading a book.
当你正在写信时，我正在读一本书。
The demand for our products has kept rising.
要求定购我们产品的人越来越多。