Helpfulnesses
(helpfulness 的复数) n. 有益；有助
🗣️ 情景例句
I'll be satisfied with a small one.
小型车就很令我满意了。
Camping with a group is fun.
大伙露营是趣味横生的事。
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，