To generalize the mainstream views on how to classify street dance at present, and to study its categorizing principles and meanings.
运用文献资料法，归纳当前对街舞运动分类的主流观点，并就其分类的原则和意义展开了探讨。
Up to present, there is no unitary method and standard to classify the catastrophe in our country.
我国目前尚无统一的灾害分类方法。
At present, many studies aimed at Wuhan urban land only settled in land quality appraise, land classify, land use degree, land use structure evolvement and dynamic inspection, and so on.
目前针对武汉市城市土地的研究仅限于土地质量评价、土地分等定级、土地利用程度、土地利用结构演变及其动态监测层面。
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