名词
中文翻译：质量中心
同义词：
['mass centre', "center of gravity例句：1. The car's center of mass is at the back.（汽车的重心在后部。）"]
例句：
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1. The car's center of mass is at the back.
汽车的重心在后部。
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2. The project's center of mass is in Beijing.
该项目的重心在北京。
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3. The weight of theobject is evenly distributed around its centerof mass.
物体的重量均匀分布在其重心周围。