principal VS principle

　　principal：the head of a school 校長

　　例：The principal spoke to us today.

　　principle：a principle is an important fact or law.

　　例：The principle of democracy is important to ourcountry.

　　stationary VS stationery

　　stationary：standing still 不動的、靜止的。

　　例：Please remain stationary.

　　stationery：writing materials 文具、信紙。

　　例：They went to the store to buy some stationery

　　uninterested VS disinterested

　　uninterested：指沒有興趣，索然無味，漠不關心。

　　例：An unterested student will not learn anything. 缺乏興趣的學生什么都學不到。

　　詞組：unterested attitude 漠不關心的態度

　　be uninterested in 對……無興趣。

　　disinterested：則表示沒有獲得利益的動機，進而意指沒有偏見，在美語中，也可以作漠不關心解

　　Two disinterested parties are needed to verify these documents for us. 我們需要兩個公正的團體來查證這些文件。