当孩子们离开家时，许多父母会感到一种失落感。

Many parents feel a sense of ___loss when their children leave home.

他遭受了逐渐的记忆丧失。

He suffered a gradual ___loss of memory.

如果工厂关闭，将会有大量的工作流失。

There will be substantial job ___losses if the factory closes down.