名词
中文翻译：Unknown
同义词：
['gravitational', 'weighty', 'heavy']
例句：
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1.The gravitational pull of the earth is what keeps us grounded.
地球的引力使我们脚踏实地。
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2. Heavy weights are used to measure the weight of objects.
重物用于测量物体的重量。
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3. Gravitational waves have been detected in recent astronomical observations.
最近的天文观测已经探测到引力波的存在。