外交关系
diplomatic relations(or ties)
中华人民共和国和美利坚合众国商定自1979年1月1日起互相承认并建立~。(中美建交公报)The People’s Republic of China and the United States of America have agreed to recognize each other and to establish diplomatic relations as of January 1,1979./建立~establish diplomatic relations/断绝~ sever(or break off)diplomatic relations; diplomatic rupture/中止~suspend diplomatic relations/恢复~resume diplomatic relations /~升格upgrade diplomatic relations/~降格downgrade diplomatic relations/~破裂break off (or rupture)diplomatic relations