Isomeride
同分异构体
🗣️ 情景例句
What did you order?
您点了什么？
Let's see what else is on.
咱们看看有没有别的节目。
Summer is from December to February, and winter is in June, July and August.
夏天从12月到2月，冬天是在6月、7月和8月。