名词
中文翻译：重力
同义词：
['heaviness', 'weight', 'seriousness']
例句：
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1.The gravity of the situation demanded immediate action.
形势的严峻性要求立即采取行动。
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2. The gravity of his illness was such that he could not even lift his head.
他的病情非常严重，以至于他连抬头都做不到。
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3.The gravity of the situation made it clear that we needed to take immediate action.
形势的严峻性使我们明白，我们需要立即采取行动。