demand 比较强硬。例如 they demanded his resignation. (他们要求他辞职。)request 比较中性。例如 They requested a tour to learn about the heritage of brand Coca-Cola. (他们请求 ...)
request 英 [rɪˈkwest] 美 [rɪˈkwɛst]n.要求;需要;所请求的事物;申请书vt.(下级对上级的)请求;请求得到;索取;邀请[常接不定式或从句]例句:They requested him to leave他们要求他离开。She had requested that the door to her room be left open.她要求不要关闭通向她房间的门。