jumping jack

 Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++

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ˌjumping ˈjack noun [countable] American English  DSJUMPa jump that is done from a standing position with your arms and legs pointing out to the side 跳跃运动〔两腿分开、两臂侧向伸展的原地跳跃〕

ˌjumping ˈjack nounChineseSyllable  

jumping jack
ˌjumping ˈjack noun [countable] American English
a jump that is done from a standing position with your arms and legs pointing out to the side