justify表示“证明…是正当的”、"证明……有理”、“为……辩护”，在不同的语境下可以灵活翻译为不同的意思，写作与口语中经常用到，例如：The end justifies the means. 为达目的不择手段。在此处end 表示“结果” “目的”，means 表示“方式”，表示只要是目的是正确的，任何手段都说得过去。
The new features of iPhone Xs cannot justify its hefty price tag.新出的苹果Xs的功能被吐槽匹配不上很贵的价格，功能并无太大提升。（hefty表示“有力的、可观的”）。
The increasingly high cost of a few extra square feet of housing, not to mention of providing a good education, also makes it economically harder to justify more children.《经济学人》官网上的博客专栏 The Economist Explains 中，在解释中国为什么放宽独生子女政策时，也用到了justify。
（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 from an economic point of view but can hardly be morally/ethically justified.
It is really difficult to justify his decision morally but is intelligible to justify the decision from an economic point of view.
（2）场景：办公司的投影仪坏了，从成本方面看很难证明更换一个新的会更合算。
造句： Replacing the projector in office is difficult to justify in terms of cost.
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