休假回来后，他花了一整天重新熟悉办公室的新流程。

After his vacation, he spent a whole day ___reacquainting himself with the new office procedures.

这次聚会是为了让多年未见的童年玩伴重新认识彼此。

The gathering was for ___reacquainting childhood friends who hadn't seen each other for years.