Wittichenite
脆硫铜铋矿, 硫铋铜矿
🗣️ 情景例句
I've got three days off next week.
下星期我有三天假。
I asked him to go to the store, but he wouldn't
我请他去商店，但是他不肯。
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，