differentials
[dɪfə'renʃlz]
n.
差异( differential的名词复数 );
工资级差;
（汽车）差动齿轮;
分速器;
例句:
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During the Second World War, industrial wage differentials in Britain widened.
第二次世界大战期间，英国的劳工工资级差进一步拉大了。
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Existing distortions in wage differentials will be magnified.
工资差别上存在的扭曲现象将被加剧.
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How can you deal with the frustration caused by perceived differentials in income growth?
你怎能安抚那些因觉察到收入增长上的差别而产生的失望?
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All Camaros have limited-slip differentials, which is nice.
来自WSJ
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And clearly cost-of-living differentials are hard to come by these days.
来自MSN
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I needed a simple device that would react to minor temperature differentials.
来自SA