Allyloxy
烯丙氧基
🗣️ 情景例句
I don't think so.
我想不是吧。
How old?
多老？
Imagine a railway station, a bus company or a cinema, which many people need to ring to find out the times of trains, buses or films.
想一想，有许多人需要打电话到火车站、汽车公司或电影院，以便弄清火车、汽车的起始时间或电影放映的时间吧。