Slipcases
(slipcase 的复数) n. 书套
🗣️ 情景例句
I was quite surprised when I read in your letter that you had decided not to finish your studies at the university.
当我在你的信中看到你已决定终止大学学业时感到很是惊讶。
The surest way to be happy is to be busy.
要快乐，最可靠的办法是忙碌。
This is what we need.
我们要的就是这个。