名词
中文翻译：球面中心枢轴
同义词：
['spherical center of gravity', 'spherical center of rotation']
例句：
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1. The ball was perfectly centered onthe table.
球正中桌子。
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2. The centerof gravity is where the weight of theobject is concentrated.
重心是物体重量集中的地方。
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3. The scientist used a center of gravityto determine the stability of the structure.
科学家使用重心来确定结构的稳定。