The neural connections of vocal control nuclei of midbrain and forebrain in hawfinch were studied by using HRP tracing method.

应用辣根过氧化物酶(HRP)示踪法对鸣禽锡嘴雀中脑与前脑发声控制核团的神经联系进行了研究。

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Most seasonal variations in the acoustic parameters of knocks and grunts can be explained by the effect of temperature on sonic muscles and central vocal control circuits.

敲击声和呼噜声的声音参数中的季节性变化，多数可以解释为发声肌肉和中央声音控制回路的温度效应。

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The writer of the identical letters threatened Mr. Bloomberg, one of the nation's most vocal advocates for gun control, and made references to the debate on gun laws.

WSJ: Letters to Mayor Bloomberg Tested Positive for Ricin

In humans the vocal tract acts as a filter on the sound from the source, and the "source-filter theory" held that the separate, fine control of the vocal tract to be the product of a long evolution in the development of the subtleties of speech.

BBC: Helium-huffing gibbons 'sing with soprano technique'

Even if a grand coalition holds together, it might be pushed by a vocal opposition into populist policies such as tighter immigration control.

ECONOMIST: Austria's election