I'm not a native speaker, and I feel difficult to pronounce unaspirated stop sound properly, such as the /t/ in "let me". I found some learning materials on internet, but they are not sophisticated about the process of pronounce unaspirated stop sound. In "let me", the /t/ is unaspirated, so as materials said, I should close the mouth and block the air stream after /lɛ/, until meet /m/ in "me", then release the air stream. I don't know whether is that right or not. I'm very confused.