3. Near field recording optical disc is a new optical disc recording technique. It has two characteristics: 1) extreme high recording density;
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It has two characteristics as well: one is the limitation of range because it is still in primary stage;
有关电视认知还体现出有两个特点：一是处在初级阶段，传播范围有限；
In the region north of the above two currents, there is a cyclonic eddy southwest of Cheju Island, it has characteristics of high density and low temperature.
在以上两支流北侧，即济州岛西南处，存在一个气旋式涡，它具有高密、低温的水文特征。
Since Cyclic economy concerns not only two big systems of economy and biology but also the enterprises' competition strength, it has special characteristics and active factors.
循环经济不但涉及到经济与生态环境两大系统，而且涉及到企业的竞争力，其显现出了自身的特点与积极因素。
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