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英语短文.睡眠爱好.

发表时间:2024-07-21 21:23:49 来源:网友投稿

Sleep

It'sclearthateveryoneneedstosleep.Mostpeoplerarelythinkabouthowandwhytheysleep,however.Weknowthatifwesleepwell,wefeelrested.Ifwedon'tsleepenough,weoftenfeeltiredandirritable.

Itseemstherearetwopurposesofsleep:physicalrestandemotionalandpsychologicalrest.Weneedtorestourbodiesandminds.Bothareimportantinorderforustobehealthy.

Eachnightwealternatebetweentwokindsofsleep:activesleepandpassivesleep.Thepassivesleepgivesourbodytherestthat'sneededandpreparesusforactivesleep,inwhich

dreamingoccurs.

Throughoutthenight,peoplealternatebetweenpassiveandactivesleep.Thebrainrests,thenitbecomesactive,thendreamingoccurs.Thecycleisrepeated:thebrainrests,thenitbecomesactive,thendreamingoccurs.Thiscycleisrepeatedseveraltimesthroughoutthenight.Duringeighthoursofsleep,peopledreamforatotalofoneandhalfhoursontheaverage.

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