Ddvp
[機] 磷酸
??? 情景例句
A very good question.
一個非常好的問題。
What do you do in your spare time?
閑暇時，你干些什么？
Before he retired, Frank was the head of a very large business company, but as a boy he used to work in a small shop.
在退休前，弗蘭克是一家非常大的商業公司的經理，但他小時候卻在一家小鋪里做工。