in short中間可以加a，但是在short後面一般要再加名詞才可以。

比如說，in a short time短期內，

in a short story短篇、短故事，

in a short ……

不可以 。它的意思是簡言之。例如

例句

1.Try tennis, badminton or windsurfing. In short, anything challenging

試試網球、羽毛球或帆板運動吧。總之，只要是有挑戰性的。

2.She was surrounded by doctors, lawyers, housewives — people, in short, like herself.

她被醫生、律師、家庭主婦——總之是一群像她一樣的人——所包圍

3.I was still in short trousers at the time.

我那時還在穿著短褲呢。

4.Books were in short supply.

書籍供應短缺。