translation.en: So for example I can rear an animal in an environment in which there is meaningless dumb sound, a repertoire of sound that I make up, that I make, just by exposure, artificially important to the animal and its young brain.
translation.zh: 举例来说，我可以在一个 充满无意义声音的环境里饲养一只动物。 这些声音是我制造出来的。 我通过将它置于该环境下，这些声音人为的 对这个动物及其幼小的大脑产生重要影响。