Goutwater
含硫化氢的矿水
🗣️ 情景例句
How well do I speak English?
我的英文说得怎样？
I enclosed some photographs in my letter.
我在信封里装了一些相片。
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，