Leucoflavin
无色核黄素
🗣️ 情景例句
When you start to work, I'll give you $ 2,500 a month.
开始上班时，给你每月2500美元。
I don't know how I can thank you enough.
我不知道怎样谢您才好。
When you type a letter, the writing appears on a screen in front of you and is recorded onto a computer disk.
当你打一封信时，字迹出现在你前面的屏幕上并顾在电脑的磁盘里。