Thrombotonin
5-羟色胺
🗣️ 情景例句
Here you are.
给你。
I asked him to buy it for me, but he wouldn't.
我请他帮我买，但是他不肯。
I was proud that we had come across something that was completely unknown and valuable and,
让我感到自豪的是，我们在无意中发现了不为世人所知的、有价值的东西，