歌唱与发声是一种肌肉运动，是有意动作和无意动作的交替进行。
Singing and sound production are two kinds of muscle movements, which are made of conscious and unconscious movements alternately.
歌唱与发声是一种肌肉运动，是有意动作和无意动作的交替进行。
Singing and sound production are two kinds of muscle movements, which are made of conscious and unconscious movements alternately.
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