Hypnograph
n. 睡眠生理测定仪
🗣️ 情景例句
What does she think?
她怎么想呢？
I heard the clock, but I didn't get up until 9.
我听见闹钟了，但我捱到九点才起。
The basic features include a crest (the highest point of the wave),
它们的基本特征包括浪峰（波浪的最高点）