照片从相框里滑了出来。

The photo had ___slipped from the frame.

那本日记滑到了床垫之间，丢了好几天。

The diary had ___slipped between the mattresses and was lost for days.

精心安装的活塞从气缸中滑出，导致发动机故障。

The carefully fitted piston ___slipped out of its cylinder, causing the engine to fail.