Nightmare: A frightening dream that usually wakes up the sleeper.
夢魘：通常會把睡眠者驚醒的可怕的夢。
Nonconscious: Not typically available to consciousness or memory.
非意識：記憶或意識中不存在的。
Non-REM (NREM) Sleep: The period during which a sleeper does not show rapid eye movement; characterized by less dream activity than during REM sleep.
非眼動睡眠：睡眠者沒有快速眼球運動的時期；以夢活動少於快速眼動睡眠爲特徵。
Norm: Standard based on measurement of a large group of people; used for comparing the scores of an individual with those of others within a well-defined group.
規範：對一大羣人進行測量的標準；用於比較一個人的分數與一個明確定義的組內其他人的分數。