... 听声音 voice-listening 无声音 absence of voice; breath; voiceless sound 音质,声音 quality ...
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This is a voiceless sound. Put your top teeth slightly over your bottom lip and blow out air quickly. Your tongue should be flat in your mouth.
这是一个轻声。把你的上齿轻轻放在你的下唇并快速发出气流。你的舌头在你的嘴里的时候应该是扁平的。
For , put your top teeth onto your bottom lip, and make a sound exactly like except voiceless.
发,要用上齿咬住下唇,发出类似的音,同样也不振动声带。
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