Cholinic acid
[化] 胆碱酸
🧩 词语组成解析
🗣️ 情景例句
He has the advantage of a good education.
他有受过良好教育的优势。
If you're not sure how to do is, ask me.
假如你拿不准怎样做，就来问我好了。
Are you holding the ladder, Jim?
你扶住了梯子吗，吉姆？