单词	center of gravity
释义	center of gravity noun phrase 1 : center of mass 2 : the point at which the entire weight of a body may be considered as concentrated so that if supported at this point the body would remain in equilibrium in any position 3 : center sense 2a Word History First Known Use 1633, in the meaning defined at sense 1 Kids Definition center of gravity noun plural centers of gravity : the point at which the entire weight of a body may be thought of as centered so that if supported at this point the body would balance perfectly
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