The existence of a negative energy spectrum presents some conceptual problems which can only be overcome in a many particle formalism.

负能谱的存在暴露了一些仅能在微粒论中才得以克服的概念上的困难。

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Based on the Cognitive Linguistics, Frame Semantics upholds that conceptual structure provides the background and motivation for the existence of lexicon.

建立在认知语言学基础上的框架语义学认为，概念结构为词在语言及言语中的存在和使用提供了背景和动因。

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On the one hand the great conceptual difference between China and the EU results in the long term existence of arguments between them.

一方面，巨大的观念差异使双方一些分歧长期存在，并在一定程度上制约双方关系的进一步深化。

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The Canadian-American border, the longest border in the world between two countries, is as willful an act of imagination as a work of conceptual curtaining by Christo, but its existence has made two separate peoples, with two separate stories.

NEWYORKER: Faces, Places, Spaces