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柯林斯星级 ★☆☆☆☆ BNC词频 7319 COCA词频 5027

n. 不一致, 变化, 变异, 分歧, 不和
[化] 方差; 变种

n. the second moment around the mean; the expected value of the square of the deviations of a random variable from its mean value
n. an official dispensation to act contrary to a rule or regulation (typically a building regulation)

英汉双解字典由 ECDICT 提供