经济学对人类的必要性、重要性与贡献，毫不逊色于自然科学。
NO SCIENCE in the world is more elevated, more necessary and more useful than economics.
第二部分：我国赋予自然人以破产能力的必要性和可行性论证。
Part II: the necessity and feasibility to give a natural person the bankruptcy capacity.
罗尔斯顿重新肯定自然界的内在价值问题的必要性。
It is necessary that Rolston render the problem of the natural value again.
罗尔斯顿重新肯定自然界的内在价值问题的必要性。
It is necessary that Rolston render the problem of the natural value again.
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