那是我唯一能做的事——我不必向任何人解释自己。

It was the only thing that I could do - I don't have to ___justify ___myself to anyone.

他试图通过解释困难的处境来为自己辩护。

He tried to ___justify ___himself by explaining the difficult circumstances.

你不需要为自己选择优先考虑家庭而辩解。

You don't need to ___justify ___yourself for choosing to prioritize your family.