SSS 2011-06-21
时间：2018-12-24 作者：英语课 分类：Scientific American(六)月
This is Scientific American sixty seconds science. I am cythina Graber. This will just take a minute.
You are lying in a hammock by a breezy shore. The hammock rocks softly back and forth 1.in no time. It turns out that not just the relaxation 2 of being on vaction that is bringing on sleep.It is the rocking hammock.Not by a huge surprize, babies get rocked to sleep,but researchers want to know how rocking works. They recruited twelve healthy males all good sleepers 3. Each volunteered twice to take afternoon nap in a dark room on a custom made bed that could rock.For one nap, the bed was still for the other,it rocked gently.All the men fell asleep faster when they swayed.And scientists monitored the men's brain activites during all the naps. They found that the rocking increased the duration of what's called N2, a non run stage that accounts for about half of good night's sleep.Rocking also increased the deep sleep associated with brain activity, so called slow oscillation as well as bursts of actionns called sleep spindles.Researchers published in the journal of current biology. The next step is to find out whether rocking can help treat sleep disorders 4.Meanwhile, in some nua*, can always try a hamic.
- The wind moved the trees gently back and forth.风吹得树轻轻地来回摇晃。
- He gave forth a series of works in rapid succession.他很快连续发表了一系列的作品。
- The minister has consistently opposed any relaxation in the law.部长一向反对法律上的任何放宽。
- She listens to classical music for relaxation.她听古典音乐放松。