旅游犯罪具有主体的广泛性、客体的同一性、时空的集中性和影响的严重性等特征。

Tourist crime has the following features: the universality of the subjects, the identity of the objects, the concentration of time and space, and the seriousness of the effects.

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第四章论述时空裂变对苏伟贞及其小说创作的影响，并总论苏伟贞的创作特征。

Chapter Four talks over the influence of space-time fission toward Su Weizhen and her writing, concluding the characters of Su Weizhen's literary creation.

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总结出省内不同区域内尘污染时空分布特征，进一步阐明尘类污染是影响我省城市大气环境的重要指标。

The features of the dust pollution distribution over time and space have been summarized of different areas in Gansu province.

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