Definition
Used to emphasize that something is even more unlikely or impossible than something else already stated as unlikely or impossible.
（用於否定句後，表示遞進強調）更不必說，更談不上。
Some people never even read a newspaper, let alone a book.
有些人甚至從未讀過報紙，更不用說一本書了。
He could barely touch his knees, let alone his toes.
他連膝蓋都幾乎碰不到，更不用說腳趾了。
There wasn't enough to keep us occupied for an afternoon, let alone the whole weekend.
這根本不夠我們打發一個下午，更不用說整個週末了。