The UN is an organisation which has long since outlived its usefulness.联合国是一个早已形同虚设的机构。It's an organization that has outlived its usefulness.这是一个已经形同虚设的机构。This policy, they say, is at best confused and at worst non-existent.有人说这项政策往好里说是混乱不堪，往坏里说就是形同虚设。