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1·Birdsong is one of the most active domains in bioacoustics.

鸟声研究则是生物声学研究中最为活跃的领域之一。

2·Clark, director of the bioacoustics research program at Cornell University, the area over which whales in coastal waters can hear one another shrinks to only 10 to 20 percent of its natural extent.

克拉克——康内尔大学生物听力研究项目主管说，近岸海水的鲸鱼出没区域能听到自然范围内仅仅10%到20%的收缩声。