词汇与表达：tar-tarnish

tarnish

It neverrusts or tarnishes  

它从不生锈，也不会失去光泽。  

Finally, please tell you, don't take your thinks himself to tarnish I.（为什么自以为是 your thinks himself）
最后，请告诉你，不要拿你的自以为是来玷污我。

The affair could tarnish the reputation of the prime minister

这一事件可能有损首相的名誉。  

tar
The oil has hardened to tar
油已经硬化成柏油了。

也指烟的油

He hopes to improve the newspaper's somewhat tarnished public image.
他希望改善报纸略有受损的公众形象。