2PHRASAL VERB 瓦解If an organization or system falls apart, it becomes disorganized or unable to work effectively, or breaks up into its different parts. 瓦解
Europe's monetary system is falling apart. [VERBPREP.]
欧洲的货币体制正在瓦解。
3PHRASAL VERB 精神崩溃If you say that someone is falling apart, you mean that they are becoming emotionally disturbed and are unable to think calmly or to deal with the difficult or unpleasant situation that they are in. 精神崩溃 [informal]
I was falling apart. I wasn't getting any sleep. [VERBPREP.]