verb · to retain, preserve, or maintain something in its original state or possession

这座古镇完整地保留了明清时期的建筑风格。

verb · to hold back or reserve one's opinion, effort, or information; to have mental reservations

他在比赛中毫无保留地发挥了自己的实力。

verb · to reserve or put aside for a specific person or future use

我已经为您保留了一个靠窗的座位。