名词
中文翻译：重力密度
同义词：
['gravitational density', 'mass density', 'density of gravity']
例句：
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1. Gravitational forces are responsible for the movement of objects in space.
引力力是物体在空间中运动的原因。
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2. The density of the material is important for its strength and durability.
材料的密度对其强度和耐用性很重要。
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3. The density of the Earth's atmosphere is affected by temperature and pressure changes.
地球大气的密度受到温度和压力变化的影响。