The pronunciation between /m/ 和 /n/:
/m/、/n/都是鼻音，使用鼻腔发音。

[m]发音时双唇紧闭，当这个音在单词的末尾是一定记住要双唇闭起来。比如一些英语学者会把some 发成 /sn/, 而正确地发这个音就应该是 /sm/。
[n]发音时舌尖抵上齿龈，而嘴巴是半开。

Say this tongue twister out loud to practice the sounds [m] [n]:
Time is money.
Mike and my mother were having a meeting now.
Don't make noise in public places.