文章以权利的本质和禁止权利滥用原则为分析出发点，阐述权利失效的构成及功能。
Starting from analysing the essence of rights and Forbidding Misuse of rights Rule, this paper elaborates the composition and function of invalidation of rights.
权利失效理论的确立，可谓学说与判例为促进法律进步的一项重大贡献。
Because of the establishment of estoppels by waiver, the precedent and doctrine do an important contribution to the progress of law.
本合同经各方法定代表人签字后生效，在合同各方的权利和义务执行完毕后失效。
This Contract will become effective after it has been duly signed by all parties' legal representative and remain in force until the rights and obligations of all parties have been fulfilled.
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