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I would like to improve my English pronunciation.

我想改善我的英语发音。

The pressuer of work was too great for him.

工作压力使他承受不了。

First the electroencephalograph (which is simply a device for recording the electrical activity of the brain by attaching electrodes to the scalp) shows that while there is a change in the pattern of activity during sleep,

第一点，脑电图记录仪（不过是一种把电极接到头皮上记录脑电活动的仪器）显示，人在睡眠时大脑活动的方式有变化，