Every individual starts with fitness 1 at point a and can raise its fitness based on how close it gets to point B. Every command "u", "d", "l", or "r" moves up, down, left, or right, respectively.

每个个体从a点开始，并且其适应性为1，然后个体可以根据它与b点的接近程度来增加它的适应性。命令“U”、“D”、“L”或“R”分别代表上移、下移、左移或右移。

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The main legal problem is centralized in the carriers responsibility in fulfilling the right obligation of B/L.

在履行提单的权利义务方面，主要的法律问题集中在承运人的责任方面。

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This is not only the solution to the legal dilemma caused by the separation of documents and goods under B/L or other documents of title, but also meets the realistic need of right-securitization.

这也是解决提单等物权凭证可能造成的凭证和货物相分离之法律困境的方法，同时也是权利证券化的一种现实要求。

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