In fact, some functions seem to be shared across nearly all mammals, like visual and auditory systems in areas for sensory and motor control.

事实上，一些功能似乎在几乎所有的哺乳动物中都有，比如感官和运动控制区域的视觉和听觉系统。

Rather, what determines the size in the brain is the extent to which either they have motor command over it or sensory control.

相反，决定大脑大小的是他们对大脑的运动控制或感觉控制的程度。