fight fire with fire
US /faɪt ˈfaɪər wɪð ˈfaɪər/
UK /faɪt ˈfaɪər wɪð ˈfaɪər/
1.
以牙还牙, 以毒攻毒
to use the same methods as your opponent, even if they are unpleasant, in order to achieve a victory
:
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When they started spreading rumors, we decided to fight fire with fire and expose their lies.
当他们开始散布谣言时，我们决定以牙还牙，揭露他们的谎言。
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Some argue that to deal with cyberattacks, you sometimes have to fight fire with fire.
有人认为，要应对网络攻击，有时你必须以牙还牙。