考察“利益”的概念、利益矛盾的客观存在性和国家运用法律平衡利益的必要性。
The concept of interest and interests contradiction as well as the necessities of making the interests to be balanced by national law are expounded.
给出了弱边优美图的概念，指出了它的客观存在性及其与边优美图、非边优美图的关系。
In this paper, the weakly edge-graceful graph is defined, and some results are obtained.
水槽实验和海岸高空照片资料上清楚的分辨出这种由反射壁效应产生的沙波的客观存在性。
From flume experiments and aeroplane photographs of the coast, one can see the existence of sand wave induced by the reflection wall.
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