jumping jack
noun /ˈdʒʌmpɪŋ dʒæk/
/ˈdʒʌmpɪŋ dʒæk/
[usually plural] (North American English)- an exercise in which you stand with your legs together and your arms at your sides and jump to a position with your legs apart and your arms spread out
跳跳杰克（Jumping jack）：一种锻炼，您可以将双腿并拢站立，双臂放在两侧，然后跳到双腿分开并且双臂展开的位置 - I leapt to my feet and executed a series of jumping jacks.
我跳了起来，做了一系列跳跃动作。
- I leapt to my feet and executed a series of jumping jacks.