单词	mass center
释义	mass center 量中心
随便看	long sound long space long spaced count rate meter long spaced detector long space disconnect long-spaced sonde long-spaced sonic log long spacing long spacing compound long-span long span long span bridge long span culvert long span land smoother long-span land smoother long span line long-span steel framing long span steel framing long-span structure longspan structure longspan transmission line structure longspan tunnel longspan underground structure long spark long spatula 暗度金针暗度陈仓暗弱无断暗斗明争暗无天日暗昧之事暗气暗恼暗淡无光暗渡陈仓暗箭中人甥馆用用不了用不着用世用主用主儿用之不竭用事用于