to defend oneself

• 无可分辩

  require no explanation

• 不由分辩

  not allowed to explain

• 证据俱在，无需分辩。

  All the evidence is here; there is no need for further explanation.

• 他们说什么，就是什么，我不想分辩。

  Let them say what they like. I have no desire to argue further.

• 用不着你来分辩。

  There's no need for you to offer an explanation.

• 我要想分辩几句。

  I would like to offer a few words of explanation.