Retrosynthesis
[化] 逆合成
🗣️ 情景例句
By the way, what are you going to do on Christmas?
顺便问一下，圣诞节你打算做什么？
I'm happy when I skate.
溜冰真是快乐呀。
A week later, Mr Brain rang Zheng Jie and spoke to a friend of his.
一周以后，布雷恩先生打电话给郑杰，接电话的是郑杰的一位朋友。