事实上，含糊其辞的中奖可能性要比获奖条件清晰明确的博彩更有效。
In fact, vaguely-stated possibilities of winning a prize were more effective than options with hard odds included.
我知道，这个标准远远称不上完美，但至少是清晰明确的。
That's far from a perfect criterion, I know, but at least it's clear-cut.
为了避免曲解，任何一个质量度量方法都是需要清晰明确的。
Any such quality metrics need to be clear and unambiguous to avoid being misinterpreted.
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