And while the argument over including such features rarely rests on a single variable, it is important to know which will resonate with decision-makers.
在争论这类特征很少取决于一个单一变量时，重要的是找到哪一点能与决策制定者产生共鸣。
Results are rarely about a single factor, and a single factor doesn't always produce the same results.
结果很少是由单一因素造成的，单一因素并不总是引起相同的结果。
Sir Rod Eddington, a former boss of British Airways, argued in a 2006 review of Britain’s transport needs that mature economies rarely see huge benefits from a single project.
罗德-爱丁顿爵士，前英国航空公司的老总，在2006年回顾英国的交通需求时表示，一个成熟的经济体很少会因为单个项目而获得巨大的收益。
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