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Opponents say the process is contaminating drinking water and polluting the air .

反对者认为，这种工艺会污染饮用水和空气。

Some opponents complain of a racial bias in its application .

一些反对者诉说在执行中存在种族偏见。

Some of mr uribe 's main opponents fared poorly .

乌里韦的主要对手中有一些进展很糟糕。

Opponents say that his government is losing credibility .

反对派声言科奇勒领导的政府正在开始失去其威信。

This has brought predictable snorts from his opponents .

这自然是引来了他的政敌们一片嘘声。