名词
中文翻译：第二动量
同义词：
['secondary moment of mass', 'second derivative of mass']
例句：
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1. The physicist calculated the second moment of mass for the projectile motion.
物理学家计算了弹道运动的第二动量。
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2. The second moment of mass is important in understanding the behavior of objects under gravity.
第二动量在理解物体在重力作用下的行为中非常重要。
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3.The scientist discovered a new law that relates the second moment of mass to the speed of light.
科学家发现了一个新的定律，将第二动量与光速联系起来。