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1·Article 7. Issuance, form and irrevocability of undertaking.

第7条保函的签发、形式及其不可撤销。

2·He mainly explains his philosophy of time about the present through three concepts: irrevocability, events and reconstruction.

他主要通过不可唤回性、事件、重构三个概念阐发了其关于“现在”的时间哲学。

3·So long as the monetary union is forged between sovereign states the principles of irrevocability and enforceability are contradictory.

只要货币联盟是由主权国家打造的，不可逆转和可以强制执行的原则就是矛盾的。

4·The authorship right is an important personal right to author and is protected by law, with characteristic of non negotiability, perpetuity and irrevocability.

署名权是受法律保护的一项重要的著作人身权，具有不可转让性、永久性和不可剥夺等特点。