But knowing the cost - benefit ratio of a purchase is not the same as knowing its value.

但是,知道一件所购之物的 成本效益 率并不等于知道了它的价值.

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As applications continue to grow, the cost - benefit ratio is simply no longer justifiable.

随着应用程序继续膨胀, 成本效益比不再是可调整的了.

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