The photographer snapped a nice photograph of him.

摄影师给他拍了一的快照。

This snapshot hasn't printed very well.

这快照印出来不太清楚。

Background: Rapid eye movement sleep behavior disorder (RBD) is a parasomnia that is manifested by dream enactment behavior.

【正文快照】 背景:快动眼睡眠行为障碍(RBD)一种表现为梦境行为的深眠状态。