He conducted a negative campaign against his opponent.
他对他的对手进行了负面打击。
We can, however, never ignore the negative influence induced by advertisement campaign.
然而，我们不能忽视由于广告宣传引起的弊端。
However, we can never ignore the negative influence induced by advertisement campaign.
然而，我们不能忽视由于广告引起的弊端。
However, we can never ignore the negative influence induced by advertisement campaign.
然而，我们不能忽视由于广告引起的弊端。
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