Hydroxytryptamine
n. 含于血液中的复合胺
🗣️ 情景例句
This is a classic in the making.
这是一部尚未完成的一流著作。
If you have no hand, you cannot make a fist.
巧妇难为无米之炊。
Nobody phoned me, did they?
没人来电话，对吧？