This Paper proposes that according to the progress of knowledge there have formed in scientific knowledge three vertical strata: the principle, the way of proof, philosophy of science;

本文提出，随着知识的进步，科学知识产生了内在的纵向分层：原理层次、求证方法层次和科学哲学层次；

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The hierarchy of medical occupations is in many ways a caste system; its strata remain intact and the practitioners in them have very little vertical mobility.

医疗职位的层级制度在很多方面都是一个层级体系，他的层级是保持不变的而且其中的从业者几乎没有垂直机动性。

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Thus, jutting peaks of sheer rock with the rock strata going almost vertical occur.

因此，岩石的峰尖突出，岩层方向几乎是垂直的。

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