Metadiazine
嘧啶
🗣️ 情景例句
You are better off waiting'till you get married before doing anything stupid.
你如果想做傻事的话，最好等到结婚后。
You are older than I am.
你比我年老。
What kind of quality control do you have?
你们用什么办法来控制质量呢？