jumper是什么意思解释一下

He's a high-jumper.

他是一位跳高的.运动员。

The jumper from the Round Tower worked for him.

圆塔上的跳塔者，为他工作。

His clothes were dark and he wore a woolly jumper.

他的外套是暗色的的，穿了一件羊毛套衫。

Who has a lucky red jumper or something like that?

谁有一个幸运兔或者之类的东西？

The jumper-wearing Mr Marchionne is not given to self-doubt.

身穿套头衫的马尔基翁内不喜欢自我怀疑。