由于决策信息的非完善性和人的认识能力的有限性等因素，经验决策也有非理性的一面。
Because of the imperfection of decision information and the limited cognitive ability of human being, experiential decisions have weaknesses.
其中的一个原因就是由于缺乏对语用能力本质及其内容的正确认识。
One reason of it is due to the lack of correct understanding about the nature and content of pragmatic competence.
由于我国科学研究的相对不足和科学认识能力的局限，目前的气候变化影响评估方法和结果还存在很大的不确定性。
Because of lack of scientific research and limit of understanding on climate change, there are still a lot of uncertainties for impact assessment methodology and results.
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