短裤子的英文单词怎么写

　　He had short trousers and scabby knees.

　　他穿着短裤，膝盖的伤口已经结痂。

　　Short trousers are improper at a dance.

　　舞会上穿短裤不成体统。

　　I was still in short trousers at the time.

　　我那时还在穿着短裤呢。

　　The seat of his short grey trousers split

　　他的灰色短裤的臀部开裂了。

　　How many inches too short were the trousers when the young man finally put them on?

　　这句话如何翻译？当这个青年穿上这条裤子的时候短了几英寸？