名词
中文翻译：变量
同义词：
['variability', 'variableness']
例句：
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1.The temperature can vary greatly from day to day.
温度每天可以有很大的变化。
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2. The cost of the product is subject to change based on market conditions.
产品的成本会根据市场条件而变化。
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3. The amount of rainfall is a variable factor in determining crop yields.
降雨量是决定作物产量的一个可变因素。