justification

He tried to present a justification for his behavior.他试图为自己的行为找一个借口。

There is no possible justification for what she did.她的所作所为没有正当的理由。

His behavior is without justification.他的行为没有正当理由。

He told lies in justification of his behavior. [=in order to make people think that his behavior was reasonable]他撒谎为自己的行为辩解。

She noted with some justification that other people had experienced similar problems. [=it was not unreasonable of her to note that other people had experienced similar problems]她指出其他人也经有过类似的问题，这也不无道理。