手提箱啪地一声打开了。

The suitcase ___snapped ___open.

门一关上，自动锁就啪地一声锁上了。

The automatic lock ___snaps ___shut as soon as the door is closed.

组件啪地一声合在一起，发出令人满意的咔哒声。

The components ___snapped ___together with a satisfying click.