Loudness: A perceptual dimension of sound influenced by the amplitude of a sound wave; sound waves in large amplitudes are generally experienced as loud and those with small amplitudes as soft.
響度：聲音的知覺維度，受聲波振幅的影響，大振幅的聲波通常被認爲是響亮的，而小振幅的聲波被認爲是柔和的。
Lucid Dreaming: The theory that conscious awareness of dreaming is a learnable skill that enables dreams to control the direction and content of their dreams.
清醒夢境：一種認爲夢的意識是可學習的技能的理論，它可以控制夢的方向和內容。
Magnetic Resonance Imaging (MRI): A technique for brain imaging that scans the brain using magnetic fields and radio waves.
磁共振成像（MRI）：一種利用磁場和無線電波掃描大腦的腦成像技術。
Major Depressive Disorder: A mood disorder characterized by intense feelings of depression over an extended time, without the manic high phase of bipolar depression.
重度抑鬱症：一種情緒障礙，其特徵是在一段時間內產生強烈的抑鬱情緒，但沒有雙相抑鬱症的狂躁高峯。