求翻译：第三章着重分析了房屋转租合同的效力，是本文的重点。分别讨论了合法转租的构成要件和法律效果，擅自转租合同的效力。在讨论擅自转租合同的效力时，考察了我国立法和司法实践中的观点，以及学说上的争论。是什么意思？

The third chapter focuses on the effectiveness of the housing sublease contract, is the focus of this article. Discussed separately in the constituent elements and the legal effect of the legal sublet, unauthorized sublease of the validity of the contract. In discussing the effectiveness of the unau

Chapter 3 focused on analysis of the rental housing to the validity of contracts, is the focus of this article. discussed separately the lawful transfer of the lease and the elements without legal effect, validity of transfer of the lease contract. During the discussion on unauthorized transfer of t

Third chapter analyzed the house to sublet the contract emphatically the potency, was this article key point.Separately discussed the constitution important document and the legal effect which sublets legitimately, sublets the contract arbitrarily the potency.Sublets the contract arbitrarily when th

Chapter III focuses on analysis of the effect of contracts of subleasing, is the focus of this article. Discusses the formation and legal effects of the illegal sublease, effectiveness of the sublease contract without authorization. In discussing the effectiveness of sublease contract without author

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