Weary of her rival's accusations, the candidate bit back [=hit back, fought back] with an aggressive ad campaign.厌烦了对手的指责，这个候选人以颇具攻击性的广告宣传活动进行了反击。

She bit back at her rival with an aggressive ad campaign.她以极具攻击性的广告宣传活动反击对手。

I attempted to smile sweetly while biting back angry comments.我努力笑得甜美些，忍住不说气话。