Without them, walking on water will be a far more difficult feat, if not completely impossible.
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There are some solutions to this problem, but ultimately it is very difficult if not impossible to solve completely.
虽然有一些解决方案可以用来解决这个问题，但是最终会非常棘手，不然的话是不能完全解决问题。
We are impossible to know the society completely and accurately if do not understand the system of a period of time.
不了解一个时期的制度，就不可能全面而准确地认识社会。
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