Ulmic acid
[化] 赤榆酸\\n[医] 榆酸
🧩 词语组成解析
棕腐质的
🗣️ 情景例句
Thank you, sir.
多谢，先生。
Here's my credit card, just bill me.
这是信用卡，请记账吧。
These were the so-called mainframe machines.
它们被称为主机。