即使在家长和孩子们在看电视时积极互动，但只要电视打开，无论是几分钟或者几小时，其净效果都是使得发声行为减少。
Even when parents and children interacted actively while watching TV together, the net effect of having it turned on, for a few minutes or hours, was a drop in vocalizations.
那之前，我总觉得是整个人在发声，从来没有想到说话的行为可以这样割裂开来看。
I had always thought the whole man spoke — had never even imagined that the act of speech could be viewed in this detached way.
母鸡也会改变行为，提高警觉性，减少梳理羽毛的次数，增加向雏鸡发声的次数。
The hens also changed their behaviour, and reacted with increased alertness, decreased preening and increased vocalisations directed to their chicks.
本文对近年鸟类控制发声学习行为的神经生物学机制的进展作了较为全面的介绍。
This article reviews the latest progresses about neurobiological mechanism of song learning and control in songbirds.
本文对近年鸟类控制发声学习行为的神经生物学机制的进展作了较为全面的介绍。
This article reviews the latest progresses about neurobiological mechanism of song learning and control in songbirds.
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