Catecholamin
[化] 儿茶酚胺
🗣️ 情景例句
Come on. You all helped.
别这样说。你们都帮了忙。
May I ask you a question?
我能问你个问题吗？
It is only 380,000 kilometres away, and it has been visited by man already.
已经有人到过月球旅行了。