jumper和sweater的区别主要在含义上。jumper作为名词，中文意思除了有“毛或棉的针织套衫”之外，还有“跳跃者”、“跳跃动物”、“跳虫”等含义；sweater作为名词，中文意思为“毛衣”、“线衣”。
一、jumper的含义及用法
jumper作为名词，意为(毛或棉的)针织套衫;跳跃者;跳跃动物;跳虫。复数形式为jumpers。例句有：
1、Isabel had on a simple jumper and skirt.
伊莎贝尔穿着素净的针织套衫和裙子。
2、The jumper comes in assorted colours.
各种颜色的针织套衫一应俱全。
3、I loved horses as a child and was a junior show jumper.
我从小就爱马，曾是一名青少年马术障碍赛选手。
4、He is a terrific athlete and a brilliant jumper
他是个出色的运动员，弹跳力非常好。
5、She wore a checkered jumper and had ribbons in her hair.
她穿着格子连衣裙，头上系着丝带。
6、The rubber rope tied to the jumper's ankle is long enough to ensure that he or she will enjoy the "free fall" in the air for a few seconds.
绑在跳跃者踝部的橡皮条很长，足以使跳跃者在空中享受几秒钟的“自由落体”。
二、sweater的含义及双语例句
sweater作为名词，意为毛衣，线衣(英国英语指套头无扣的;美国英语可指开襟有扣的)。例句有：
1、I think I'll swap this sweater for one in another colour.
我想把这件毛衣换成一件其他颜色的。
2、The new sweater was a tight fit.
这件新毛衣很贴身。
3、Turn the sweater inside out before you wash it.
你把针织套衫里面翻过来再洗。
4、Pausing only to pull on a sweater, he ran out of the house.
他只停下来穿了件毛衣就冲出了屋外。
5、I was wearing false eyelashes and a sweater two sizes too small.
我戴着假睫毛，穿着小了两号的毛衣。
