maintained
英 [meɪnˈteɪnd] 美 [meɪnˈteɪnd]
v.
维持;保持;维修;保养;坚持(意见);固执己见
maintain的过去分词和过去式
例句
We must try to ensure that vital food supplies are maintained.
我们必须确保维持生命所必需的食物之供应。
The two countries have always maintained close relations.
这两个国家一直保持着密切关系。
The house is large and difficult to maintain.
房子很大，难以养护。
