Tough love, moreover, is a subjective concept.

严厉的爱，更加是一个主观的概念。

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Utility is a subjective concept, covering everyone's subjective judgement on their sense of satisfaction and happiness.

效用是一个主观的概念，涉及每一个人对于自身满足感和幸福的主观判断。

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It might be a subjective concept -- one man's cool Hawaiian party shirt is another's discarded Christmas gift -- but certain brands do seem to stay in fashion forever.

这可能是一个主观概念——某人时髦的夏威夷花衬衫可能在其他人眼里不值一提——但是这些牌子却一直走在时尚的前沿。

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But plurality is a more nebulous and - some would say - more subjective concept than competition.

BBC: Ofcom expected to review News Corp's bid for Sky

The challenge for corporations is that a social license to operate is a subjective concept, not a piece of paper.

FORBES: Three Ways to Secure Your Social License to Operate in 2013

It might be a subjective concept -- one man's cool Hawaiian party shirt is another's discarded Christmas gift -- but certain brands do seem to stay in fashion forever.

CNN: Six secrets behind cool brands