My first impression about the two words

来源: 于 2009-06-19 18:19:49 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

The the vowel in the second syllable in "maintain" and the first syllable in "maintenance" are pronounced as /ei/ and emphasized; all the other syllables are not emphasized and the vowels are sounded as aschwa sound.