科技英语文章.doc

文档介绍：科技英语文章ArcticMelt Earth',however,theamountoficeintheArcticOceanfelltoarecordlow1. Normally,,theamountoficeleftbytheendofsummerhasbeendeclining. Since1979,-of-,iceintheArcticlost22percentofitsthickness--. Lastsummer,,''saverylarge23percentbelowthepreviousrecordlow, Theremaybeseveralreasonsfortheicemelt,saysJinlunZhang,,leavingalargeareaofthiniceandopenwater4. ,℃℃warmerthanthepreviousrecordhigh5. Withbothairandwatergettingwarmer,,northofAlaskaandwesternCanada,