Polysomnogram
[医]多睡眠图
🗣️ 情景例句
I know the house.
我熟悉这房子。
The morning sun never lasts a day.
好景不常。
The further off this solid obstruction, the longer time will elapse for the return of the echo.
固体障碍物越远。回声返回所用时间就越长。