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In reality, some people are vocal and may moan and groan, other folks may muffle any sounds with a pillow, and yet others may not make a single peep.

事实上，有些人会出声，他们可能会唉声叹气，其他人可能会用枕头闷住任何声音，还有另一些人可能不会发出任何声音。

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Though other important behaviors need to be considered as well, vocal changes that deviate from the norm can indicate deception.

虽然也还需要考虑其他重要的行为举止，但与正常状态有偏差的声音变化的确能够指示出欺骗。

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One observer after another extols the purer and simpler delivery of a bygone age and deplores contemporary singers who wallow in trills, slides and other vocal histrionics.

WSJ: Book Review: The Cambridge History of Musical Performance

Time and again he returns in his operas and other vocal music to the theme of childhood as an Eden-like idyll of innocence that is disrupted by the intrusion of sexually knowing adults.

WSJ: Benjamin Britten | Known but Not Loved | Sightings by Terry Teachout

In other cases, vocal cord paralysis may develop from an unknown cause (idiopathic).

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