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(dòng)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(guān)心。
例：An unterested student will not learn anything. 缺乏興趣的學(xué)生什么都學(xué)不到。
詞組：unterested attitude 漠不關(guān)心的態(tài)度
be uninterested in 對……無興趣。
disinterested：則表示沒有獲得利益的動(dòng)機(jī)，進(jìn)而意指沒有偏見，在美語中，也可以作漠不關(guān)心解
Two disinterested parties are needed to verify these documents for us. 我們需要兩個(gè)公正的團(tuán)體來查證這些文件。
