(iv) Mail operations services: efficient, reliable, cost-effective means of transmitting official correspondence and material through the worldwide pouch and postal service and the messenger service within the Headquarters complex;
㈣ 邮政服务：通过世界范围的邮袋和邮局服务以及总部房地内的信使服务，以高效、可靠和高成本效益的方式传送公函和官方材料；