它也许只是随意涂鸦，但考虑到它来自世界上最知名的科学家，其可信度就必然会有一定的增加。
It may be just graffiti, but considering that it comes from the most well-known scientists in the world, its credibility will definitely increase.
所以，首先一定的引述其可信的成本和效益。
So, first make certain about the quoted cost and its credible benefits.
它是由用户提供给系统的信息来提高其可信度的。
It is up to users to provide the system with information that boosts its credibility.
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