维护的英文：
defense
safeguard
protect
uphold
maintain

参考例句：

Preserve order
维护秩序

Maintenance engineer
技术维护工程师

vindicate one's rights
维护自己的权利

Assortment of common hand tools of the type used to service electromechanical equipment
各种用于机电设备维护的通用手工工具。

Lift Motor Room : A room containing the mechanical equipment for servicing lifts.
电梯机房:存放电梯维护设备的房间

Safeguard the personal security and safety of the property for the investors
维护投资者的人身和财产安全

Establishing and safeguarding a labour system that is adaptable to a socialist market economy
建立和维护适应社会主义市场经济的劳动制度

Without the instrumentality of a free press liBerty could not Be preserved.
如果不能有效地利用新闻自由，就无法维护自由。

American troops stationed in nicaragua were sustaining a minority government in that country
驻扎在尼加拉瓜的美军维护该国的一个少数派政府。

This site is produced and maintained by the U.S. Department of State's Bureau of International Information Programs.
本网站由美国国务院国际信息局制作并维护。

defense是什么意思：
n. 防御，防御工事；防御物；防御措施；辩护；（比赛中的）守方
v. 抵御，防御

(in a match) the defense
守方

The defenses of the city must be strengthened.
这个城市的防御工事必须加强。

He was the then secretary of Defense.
他是当时的国防部长。

safeguard是什么意思：
v. 保卫，保护
n. 保卫，保护（措施）

safeguard national independence and state sovereignty
维护民族独立和国家主权

It is obligatory for everyone to safeguard our motherland.
保卫祖国人人有责。

What is the solution to safeguarding competition on the Internet?
有什么方案可以保证因特网上的公平竞争

protect是什么意思：
v. 保护，保卫

A protective overlay, as for a mattress or furniture.
护套保护性的饰布，如坐垫或家具。

a protective case for a knife or sword.
刀或剑上的保护性外壳。

invoke the protection of...
祈求…的庇护