Though it was based on very little evidence, many scientists thought that all mammalian brains, including the human brain, were made in the same way, with a number of neurons that was always proportional to the size of the brain.
即使那些都是基于一些非常小的证据， 很多科学界认为所有的哺乳动物的大脑， 包括人类的大脑 是由同样的东西组成， 一系列的神经元和大脑的大小 总是成为成正比