He puts all the accusations down to a smear campaign by his political opponents.

他把所有的指控归因于由其政敌发起的诽谤活动。

《柯林斯英汉双解大词典》

He was a victim of a smear campaign.

他受到对方的毁谤攻击。

《牛津词典》

Mr Bin Hammam denied the charges and said it was a smear campaign launched by those backing Sepp Blatter.

哈曼否认了这些指控，称这是布拉特的支持者策划的诽谤活动。

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Mr.Olmert says that for the past three years he has been subjected to an "almost inhumane smear campaign,"

VOA: standard.2009.09.25

His spokesman also attacked what the paper said was a Labour smear campaign against the businessman.

BBC: Labour pop guru turns on Blair

"It's a smear campaign by these self-appointed consumer advocates and plaintiffs' attorneys, " says Curt D.

FORBES: Souring On Sweeteners

Assange has maintained his innocence and called the charges in Sweden a smear campaign.

CNN: The secret life of Julian Assange