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	aleknight aleksandar obrenović aleksandr aleksandrovsk aleksandrovsk-grushevski Alemanni Alemannic Alembert, d' alembic alembicate alembicated alembication alembics alembroth Alemán Alemán Valdés alencons alençon Alençon diamond aleph aleph-bet aleph-null alephs alepidote alepisauri

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