Umbelactone
羟甲基甲基呋喃酮
🗣️ 情景例句
I'm just not sure about what I want to do.
我不知道该读什么？
He is a big figure in the business world.
他在商界是一位很有威望的人。
I'm afraid not. She isn't here at the moment. Can I take a message?
恐怕不行。她这会儿不在。有话要我转告吗？