合法的婚姻以双方合意为要件，而不因同居事实成立。
What validates a marriage is the consent of the parties, not their cohabitation.
合法的婚姻以双方之合意为要件，不因同居之事实而成立。
Legal marriage with bilateral acceptability of elements, not due to the fact of the cohabitation was established.
第三部分分析了唐代婚姻成立的要件及其法律效力。
The third part mainly discusses important document of Tang Dynasty marriage law system and its legal effect.
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