1. 英英释义：To justify a decision, action, or idea means to show or prove that it is reasonable or necessary.

2. 理解：“证明…是正当的”，口语书面都常用的词，对应的翻译比较灵活多变。

常用搭配：really,trully+justify/+hardly/+can,could/+attempt to,seek to,try to/+need to/be difficult to,be hard to/+on the ground of(that)/+to

3. 应用

1）翻译：他的决定从经济上完全可以理解，但从道德上很难成立。

His decision can be justified economically but not morally.

参考译文：His decision can be justified from an economic point of view but can hardly be morally/ethically justified.

2) 造句：

He attempted to justify his decision, but failed./He failed to justify his decision./He founded it difficult to justify his decision.（他发现很难证明自己的决定是合理的）