sleep

Most healthy adults need to sleep for seven to eight hours each night to maintain optimal physical health.

(Chinese) 大多数健康的成年人每晚需要睡七到八小时，以维持最佳的身体健康。

I am so exhausted after the long international flight that I could sleep for a whole day without waking up.

(Chinese) 长途国际飞行后我太累了，我可以不醒地睡上一整天。

A lack of deep, restorative sleep can significantly affect your memory and ability to concentrate on tasks.

(Chinese) 缺乏深度、恢复性的睡眠会显著影响你的记忆力和专注于任务的能力。

The baby finally fell into a peaceful sleep for three hours after being fed and gently rocked.

(Chinese) 在喂过奶并轻轻摇晃后，婴儿终于平静地睡了三个小时。