Norcholanic acid
[化] 降胆烷酸
🧩 词语组成解析
🗣️ 情景例句
I'll give him your message as soon as he's available.
他一有空我就转告他您的留言。
Mr. Wang is not in now.
王先生现在不在此地。
Yes, speaking.
是我，请讲。