否定人为因素造成的气候变化首先导致对科学常识的否定，然后是对基本数据的否定。
The denial of man-made climate change mutated first into a denial of science in general and then into a denial of basic arithmetic.
本文首先简单介绍了否定在语义学中的特点，分类及其在语用学中的研究地位，然后从认知语言学的角度对否定进行了尝试性的研究。
This paper, on the basis of a brief discussion of negation in the field of semantics and pragmatics, makes a tentative attempt to the study of negation from a cognitive perspective.
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