可以加也可以不加。
rope jumping 2.toskip 3.skiprope 4.skipping-rope 5.skipping
例如：
孩子们喜欢跳绳。
Children are fond of skipping.
那个男孩正在玩一个长跳绳。
The boy is jumping a long rope.
两个女孩正在玩跳绳。
Two girls are playing with a skipping rope.
A skipping rope (British English) or jump rope (American English) is a tool used in the sport of skipping/jump rope where one or more participants jump over a rope swung so that it passes under their feet and over their heads.