当前我国循环经济研讨中的单薄环节是其理论研讨。
The current study of circular economy is the weak link in the theory.
长期以来，学者们对旅游活动的研究多集中于旅行社的环节，对旅游景区管理中的财产侵权问题的研究略显单薄。
The academic researches on tourism have long been focused on travel agencies, and the study of the property tort in the administration of tourist attractions is inadequate.
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