In particular, assurance would be needed that a warhead had entered the verification regime, and a continuity of knowledge would thereafter need to be maintained to ensure that no subsequent substitution of materials could take place without being discovered.
特别是，需要保证弹头已纳入核查制度，随后还需要继续掌握情况，确保不会发生材料被替代而不被发现的情况。