Biindoxyl
联β-羟吲哚
🗣️ 情景例句
Good morning. Restaurant Service. May I help you?
早上好，餐厅服务部，能为你效劳吗？
It is good fishing in troubled waters.
混水之中好摸鱼。
What do the machines do? asked Jim.
“这些机器做什么用？”吉姆问。