Norcholanic acid
[化] 降胆烷酸
🧩 词语组成解析
🗣️ 情景例句
I think I'm quite proficient in both written and spoken English.
我认为我在英语读写方面相当熟练。
I'd like to make an appointment with Professor Smith. Would 9:00 tomorrow be all right?
我想和史密斯教授约个会面时间。明天9点行吗？
No, I'm English.
不，我是英国人。