sleep a deep and dreamless sleep
夢も見ずに熟睡する
sleep by day and move by night
昼間眠り夜活動する
sleep heavily
ぐっすり眠る
sleep in the grave
墓に眠る
sleep induced by drugs
薬の作用による眠り
Sleep is essential to life [for the preservation of life].
睡眠は生命［生命の維持］に欠かせない
Sleep is the only cure for tiredness.
疲れた時には睡眠が一番
sleep late
寝過ごす
sleep light
浅く眠る
sleep lightly [fitfully]
眠りが浅い
