not know from nothing的用法和樣例：
例句
- He's not altogether sure what to do.
他全然不知該怎麼做。 - Cocooned in luxury, sheltered from reality, they don't know what travelling is all about.
他們享受舒適豪華，與現實世界隔絕，全然不知旅行的真諦何在。 - I do not know the first thing about software.
我對計算機軟體毫無所知。 - We know nothing about the financial affairs of the firm mention in your letter.
我們對貴方來函中所提及公司的財務狀況毫無所知。
