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Selfishness tarnishes everything it touches .

自私触及到的一切东西都被玷污。

Brass tarnishes quickly in wet weather .

天气潮湿时黄铜很快会失去光泽。

Sloth tarnishes the edge of wit .

懒散能磨去才智的锋芒。

Anything that smacks of an alternative pole of power or tarnishes china 's image as a hassle-free investment destination has generally been taboo .

任何有支持另一极权力意味，或玷污中国作为无麻烦投资目的地形象的言论，通常被视为禁忌。

A white soft metallic element that tarnishes readily ; occurs in rare earth minerals and is usually classified as a rare earth .

一种白色的软质金属元素，易失去光泽，存在于稀土矿物中，通常被归为稀土类。