Hydroxytryptamine
n. 含于血液中的复合胺
🗣️ 情景例句
Oh, put your heavy jacket on, Robbie.
把你的厚夹克穿上 ，Robbie。
An old dog cannot alter its way of barking.
老狗难改吠声。
We want to order some of these.
我们想订些这种货。