名词
中文翻译：偶数
同义词：
['double', 'quadruple', 'quintuple']
例句：
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1.The evens are the numbers that add up to a multiple of two.
偶数是那些加起来是两的倍数的数字。
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2.He bought an even number of books for his collection.
他买了一些偶数数量的书来收藏。
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3.The evens in the sequence have a common difference of four.
序列中的偶数有一个共同的差值四。