adj.發(fā)狂的；[醫(yī)]精神錯(cuò)亂狀態(tài)的

He writes in despair, and the result is a demented book. 他是在絕望寫作中的，寫出來(lái)的是一本瘋狂的書。

When her child was two hours late, she became quite demented. 她孩子晚了兩個(gè)小時(shí)，她心急如焚。

No one knows for certain the identity of this masked and demented murderer. 沒(méi)人知道這個(gè)帶著面具、精神錯(cuò)亂殺手的真實(shí)身份。