5. Again, at one time or another, you may have found that all such animals hear. Hunters know that birds are attracted by artificial calls, and fishermen emphasize that you should be as quiet as possible if you dont want to go home empty handed. And if you ever hunted frogs in your childhood, you know how softly you had to tread! Moreover, it seems absurd that birds should sing and frogs croak, if they could not even hear their own voices.
5、此外,你可能曾经发现所有的这些动物都在听。猎人们知道鸟类会被人造的声音所吸引,渔夫们则强调,如果你不想空手而归的话就要尽可能的安静。如果你在童年抓过青蛙,你应该知道要多么轻柔地走动。说实在,青蛙在叫,鸟儿在唱,如果它们甚至听不到自己发出的声音,岂不荒谬。
6. By direct observations and many experiments, biologists have discovered that practically all animals have some sense of hearing or vibration. Earthworms feel vibrations in the soil, fish can be trained to respond to certain tones, male mosquitoes are attracted by the sound of the female, and frogs will respond to a tape recording of their own voices.
6、通过直接观察和许多试验,生物学家已经发现,实际上所有的动物都具有某种听觉或振动感。蚯蚓在土壤里能感觉震动,鱼类可以训练的对特定的音调有反应,雄性蚊子可以被雌性蚊子的声音所吸引,青蛙对它们自己的声音的录音有所反应。
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