Thrombocytin
血小板素, 血清素, 5-羟色胺
🗣️ 情景例句
What is the charge for that?
那要多少费用？
Come in, please.
请进。
We have just moved into a new house and I have been working hard all morning.
我们刚刚搬进一所新房子，我辛辛苦苦地干了整整一个上午。