Mutamer
变构物, 旋光异构物
🗣️ 情景例句
and I can give you and Mrs. Stewart a month of classes free.
我让你和你太太免费上一个月的课。
They are curious about what I've done with my time.
他们希望知道我一个人在做什么。
Many strange new means of transport have been developed in our century,
本世纪已研制出许多新奇的交通工具，