描写濒临危机动物的英语作文北极熊北极熊,是世界上最大的陆地食肉动物,又名白熊。下面是小编分享的描写濒临危机动物的英语作文北极熊,欢迎大家阅读! 写濒临危机动物的英语作文北极熊篇一: WhentheArcticOceanfreezesoverintheautumn,polarbearssetoffinsearchoftheirfavoritemeals:,,,that'swhat',thewarmerice-'sahungrybeartodo? Scientistsoncethoughtthatpolarbearsmightsurvivebysupplementingtheirpinnipeddietbyturningtoterrestrialfoodslikesnowgeese,theireggsandcaribou. "We'vehadthisdebateintheliteratureaboutwhetherterrestrialfoodsarenutritionallyrelevanttopolarbearsduringtheon-landseasonwhentheicehasmelted." UniversityofAlbertabiologistNickPilfold. "Andwe'veknownforalongtime,goingbacktoresearchintheearly70s,evengoingtobacktoearlyexplorerlogs,,energetically."Inotherwords,dothesesubstitutesprovideenoughnutritiontomakeupforthelostseals? Tofindout,PilfoldandhiscolleaguesestimatedtheweightlosteachdaybypolarbearsinthewildsofwesternHudsonBayduringtheice-freeseason,'sPolarBearAlertProgram. Whilecaptive,,esstotheArcticsnack
