no more...than 与 not...more than

no more than = 只是
not more than = 不超过/不多於
e.g.I am no more than a visitor.
我只是一个旁观者
e.g. Please write an essay of not more than 500 words
请写一篇不多於500字的文章

no more...than 高级意思 不比
men may be no more wise than the ancient

“no more ...than”是“ 不 …… 也不 ” 的意思.
例如：He is no more diligent than you.你不勤奋,他也不勤奋.
“not more ...than”是“ 不像 …… 一样,不如 …… 一样 ”的意思 .
例如：He is not more diligent than you.他不像你那样勤奋.

no more...than含有消极,否定的意味,译为"A与B都不……,不……也不"等。
not more...than含有积极,肯定的意味,表示程度上的差异。
例句：
He is no more diligent than you. 你不勤奋,他也不勤奋。(两人都不勤奋)
He is not more diligent than you. 他没有你那么勤奋。(意指两个人都勤奋,但你更勤奋)
She is no more a teacher than a worker. 她既不是工人,也不是教师。
She is not more a teacher than a worker. 说她是个教师,倒不如说她是个工人。
以下解释出自牛津：no more... than 和 no more than
和...一样不; 和...都不; 不超过: You're no more capable of speaking Chinese than I am. 你我都不会说汉语. * It's no more than a mile to the shops. 离商业区不过一英里.
朗文：
no more ... than
He's no more fit to be a priest than I am!他和我一样
都不适合当牧师！