Methylumbelliferone
甲基7-羟基香豆素
🗣️ 情景例句
How do you do?
你好。
Life is not all beer and skittles.
人生并不全是吃喝玩乐。
Experts believe that there are about 40,000 different types of job in the world. Choosing the right one is a difficult job in itself.
专家们认为世界上大约有4万个不同种类的工作。要从中选择一个适合自己的工作是很困难的。