wake的形容词都有wake-up，adj. 醒过来的；引起激动的，wakeful，adj. 醒着的；失眠的；警觉的，

The eye controlled by the sleeping hemisphere keeps shut, while the wakeful hemisphere's eye stays open and alert.

由睡眠大脑半球控制的眼睛保持关闭，而清醒大脑半球的眼睛保持睁开和警觉。