Monohalogenation
一卤化作用
🗣️ 情景例句
What subject did you major in university?
你在大学主修的科目是什么？
You won't get away with this.
你逃不掉惩罚的。
How long can you hold your breath underwater?
你在水里屏住气不呼吸能呆多久？