So we need active sleep because dreaming helps us to rest our minds.

所以我们需要主动睡眠，做梦能帮助大脑休息。

Through the night, people alternate between passive and active sleep. The cycle is repeated several times throughout the night.

整晚我们都在主动睡眠和被动睡眠之间转换。这个循环一晚上要重复好几次。

There are two kinds of sleep, active sleep and passive sleep. The passive sleep gives our body the rest that is needed, and prepares us for active sleep in which dreaming occurs.

主动睡眠和被动睡眠。被动睡眠可以让我们的身体得到所需要的休息，并且为我们进入主动睡眠做好准备。做梦就是在主动睡眠阶段。

" It's also called paradoxical sleep or active sleep, because REM sleep is actually very close to being awake, " said Dr. Rajkumar Dasgupta, a sleep medicine and pulmonary specialist at the Keck School of Medicine of the University of Southern California.

“它也被称为矛盾睡眠或主动睡眠，因为快速眼动睡眠实际上非常接近清醒，”南加州大学凯克医学院的睡眠医学和肺部专家 Rajkumar Dasgupta 博士说。