translation.en: A lot of my career has been devoted to trying to understand how these animals use their learning, use the ability to change what you say based on what you hear in their own communication systems.
translation.zh: 我职业生涯中花了很多时间 试图弄明白 这些哺乳动物如何运用它们的学识， 运用这一能力： 基于所听到的改变所说的。 这些都在它们自己的沟通系统中。