我经常丢三落四的，我父母说 我的头要不是与身体连着，也会被我弄丢的！

I lose things so often that my parents say I’d lose my head if it weren’t screwed onto my body!

youdao

但他并不是一个完美的人，他有些时候会脑子短路，有时会丢三落四的，幸好他这个毛病不是经常发作的。

He is not perfect, some times he may got his mind short cycled, sometimes he forget thing. Fortunately it does not happen often.

youdao