正如自然中很难存在真空一样。 遵从经济学原理，“安全公司”这种可以解决黑客窘境的小型行业出现了，填补了业界的空白。

Since economics, like nature, abhors a vacuum, a small industry of “security companies” has emerged to exploit the hackers' dilemma.

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本论文采用安全经济学基本原理，具体研究了建筑工程安全的投入、产出和效益。

Based on the theory of safety economics, this paper studies on safety inputs, safety outputs and safety benefits in construction projects.

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