名词
中文翻译：减少的程度
同义词：
['decreased degree', 'reduced value']
例句：
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1.The temperature has been reduced by 20 degrees Celsius.
温度已经降低了20摄氏度。
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2.The company's stock price has decreased by 5% since the last quarter.
公司的股票价格自上一季度以来已经下降了5%。
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3. The amount of water in the reservoir has been reduced by 70% due to drought conditions.
由于干旱条件，水库中的水量已经减少了70%。