维护正义

uphold justice

维护尊严

preserve dignity

维护民族独立

safeguard national independence

维护世界和平

safeguard world peace

维护两国人民的友谊

preserve friendship between the citizens of the two countries

维护公共利益

safeguard public interest

维护社会治安

maintain public order

技术维护

technical maintenance

设备的维护

maintenance of equipment