Retrosynthesis
[化] 逆合成
🗣️ 情景例句
It's too crowded in the bus. I think I'll have to get off to walk the rest of the way home.
车上太挤了，我想剩下的路我必需下车走路回家。
Is this your book?
这是你的书吗？
It's time I went and picked up my little girl from school.
我该去学校接我的小女儿了。