fricative consonants,

为什么我发翘舌音时会不自觉地嘟嘴?
of english consonants place manner stops or plosives fricatives
经管营销 生产/经营管理 consonant clustersppt english consonants
pclass5 | eng90
p> b>浊齿龈后擦音 /b>(voiced palato-alveolar fricative 或voiced