Sinapic acid
[化] 芥子酸
🧩 词语组成解析
🗣️ 情景例句
This has been a hard course for me.
这门课对于我来说很难。
How much is it all together?
一共多少钱？
I was very tired this morning. I couldn't get up.
我早上很累，起不来。