" it ' s conceivable they developed ways to communicate with people since they ' ve interacted with people for so many years , " says douglas nelson , a professor of bioacoustics at ohio state university 俄亥俄州立大学生物声学教授道哥拉斯?尼尔森说： “因为它们和人类打交道已经这么多年了，所以它们逐渐找到和人类更好的交流的方法也是可以想象的到的。
