名词
中文翻译：严重性
同义词：
['importance', 'gravity', 'seriousness']
例句：
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1.The severity of the disease is increasing.
这种疾病的严重性正在增加。
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2. The situation was so serious that we had to call for help.
情况非常严重，我们不得不求助。
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3.The severity of the problem required immediate action.
问题的严重性要求立即采取行动。