maintains
英 [meɪnˈteɪnz] 美 [meɪnˈteɪnz]
v.
维持;保持;维修;保养;坚持(意见);固执己见
maintain的第三人称单数
例句
We aim to maintain high standards of customer care.
我们的宗旨是始终以高标准为顾客服务。
The house is large and difficult to maintain.
房子很大，难以养护。
It was difficult to maintain a secure foothold on the ice.
在冰上不容易站稳脚。
