实际上，尽管抗氧化剂同游离基之间会产生反应且能中和自由基，也可以阻止其产生损害，但几乎没有证据证明抗氧化剂能阻止癌症。
In reality, although antioxidants interact with and neutralize free radicals and prevent them from causing damage, there is little available evidence that antioxidants prevent cancer.
羟基自由基参与的化学反应属于游离基反应，化学反应速度极快。
The chemical reaction of hydroxyl radical is free radical reaction, whose reaction speed is very high.
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