(自以为)什么都精通

That little creep over there always thinks he knows all the answers.

那边那个小家伙老是以为自己样样都通。

无心过问，看透一切

She doesn't bother any more. She knows all the answers.

她不再烦恼，全都看透了。

(常用于否定句)彻底了解(一件事)

Even your doctor doesn't have all the answers.

你的病就连你的医生也并不完全了解呐。