English-Chinese/Non-REM sleep occurs first and after a transitional period is called slow-wave sleep or deep sleep

Non-REM sleep occurs first and after a transitional period is called slow-wave sleep or deep sleep. During this phase, body temperature and heart rate fall, and the brain uses less energy.

非REM睡眠首先发生，并且在过渡期后称为慢波睡眠或深度睡眠. 在这个阶段，体温和心率下降，大脑使用更少的能量.