callisthenics
noun [ U, + sing/pl verb ] UK (US calisthenics) uk/ˌkæl.ɪsˈθen.ɪks/ us/ˌkæl.ɪsˈθen.ɪks/
健美体操
(a system of) simple physical exercises that are done to make the body firm, able to stretch easily, and more attractive
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