The two main justifications for adding chips to passports are that they improve security at border crossings and speed up immigration procedures.

有两个主要说辞支持在护照中加入芯片：提高边境口岸的安全性与加快入境手续办理。

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Indeed, this was one of the main justifications for raising interest rates in Britain this year.

ECONOMIST: Yesterday's financial architecture needs refurbishing

One of the main justifications for quantitative easing is that higher asset prices will ultimately instill confidence, igniting so-called animal spirits.

WSJ: Central Bankers' Change

One of the main justifications for troops being in Afghanistan is the training of Afghan security forces to handle the situation once UK forces withdraw in 2014.

BBC: William Hague