名词
中文翻译：变量
同义词：
['variation', 'variation', 'variable', 'changeable', 'variableness']
例句：
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1. Thetemperature is a variable that can affect theoutcome of the experiment.
温度是一个可变因素，可以影响实验的结果。
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2. The amountof rainfall is a variable that can varygreatly from year to year.
降雨量是一个可变因素，每年都有很大的差异。
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3. Therate of change in the population is avariable that requires careful monitoring.
人口增长率是一个可变因素，需要仔细监测。