Cycloamination
成环胺化作用
🗣️ 情景例句
I had a busy day. I'm done.
我今天很忙，现在精疲力尽。
The target shooting requires the power of concentration.
射击需要集中精神。
Many people prefer living in the country to living in the town.
许多人喜欢住在农村而不喜欢住在城市。