eight-channel electroencephalograph

例句：

1. 1. Theeight-channel EEG machine is used to monitor brain activity during sleep.
   八通道脑电图机用于监测睡眠期间的大脑活动。
2. 2. The patient's EEG showed abnormalities in the left hemisphere.
   患者的脑电图显示左半球异常。
3. 3. The study found that the eight-channel EEG machine could detect early signs of epilepsy.
   研究发现，八通道脑电图机可以检测到癫痫的早期迹象。