unlimited duration短语¹⁴⁴⁹⁷²⁺² 基本例句 无期限 This Agreement is concluded for unlimited duration, but each Party may, at any time, request its termination by serving a written notice through diplomatic channels to the other Party. 任何一方可在任何时候通过外交途径书面通知对方要求本协定终止。 zftrans