fricative consonants,

英语学习 fricatives摩擦音 fricatives / fricative consonants
<br><br>在ipa中:<br>[x]是velar fricative(软腭
fricatives摩擦音ppt
用最简单的话来解释,θ是一个interdental fricative(齿间摩擦音).
vowel (1), semivowel (2), fricative (3), plosive (4), nasal (5)