This paper studies the functions of futures market, which is established on the social trial-and-error cost.
文章立足于社会试错成本的视角分析了期货市场功能，认为期货市场的主要功能之一是节约社会试错成本。
It may avoid detours and shorten the time of trial and error, thus enabling the late-comers to achieve more with less cost.
这样可以少走弯路，缩短在黑暗中探索的时间，使后来者能以较小的代价取得更大的成就。
In practical process, the crown is designed by trial and accumulative experience, leading to low efficiency, high cost and big error.
在实际工程中，靠人为摸索和经验积累来估计凸度，不仅效率低、成本高，而且误差大。
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