Others are linked to non-REM sleep, with no rapideyemovements or dreaming.
还有一些睡眠中心与非快闪睡眠（即不存在眼部的高速运动或睡梦）有关。
2
We also know that at seven months a fetus is dreaming, its muscles and eyemovements giving the tell-tale signs of REM (or rapideye movement) sleep and non-REM sleep.