感觉是不一样的,相关的发音视频见内,供你参考。

1. cup, hut, love.



English: How to Pronounce UH as in BUTTER [/ ] vowel
https://www.youtube.com/watch?v=sJupiMmsbx0



American Accent 60 Words with "uh"  [/ ] Vowel Sound - American English Pronunciation Lesson
https://www.youtube.com/watch?v=ausxODBl6m0

2. ago, sofa



English: How to Pronounce the Schwa(英语中非重读音节的元音) [?] -- American Accent https://www.youtube.com/watch?v=rM9NxK74JSE
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