单词	center of mass
释义	center of mass noun phrase : the point in a body or system of bodies at which the whole mass may be considered as concentrated Word History First Known Use 1862, in the meaning defined above
随便看	American dewberry American dipper American dog tick American dog violet American dream American dreams American dwarf birch American eagle American ebony American eel American egret American elder miss miss a beat miss its mark miss its/the mark Miss Nancy miss nancys miss one's calling miss one's vocation miss out miss out on miss the boat miss the forest for the trees miss the mark

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