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1、http://bailiedu.com托福听力TPO1原文Lecture4下面就让小编来为大家介绍一下托福听力TPO1原文中Lecture4的文本内容吧，大家要好好把握，这些都是非常有价值的材料，希望能够给准备托福听力的同学带来帮助。TPO1Lecture4BiologyNarratorListentopartofalectureinabiologyclass.ProfessorFortoday’sdiscussion,we’llreviewthecasestudyonhowsomeanimalshavebehaviorallyadaptedtothei
2、renvironments.Nowyouhadtoreadabouttwoanimalspecies,theEasternmarmotandtheOlympicmarmot.Marmotsarerodents.Theyarelargegroundsquirrels,aboutthesizeofanaveragehousecat.Andtheyliveinavarietyofhabitats.Andeventhoughtheyspendthesignificantportionoftheyearhibernating,accordingtothiscase
3、study,marmotsarestillconsideredexcellentsubjectsforanimalbehavioralstudies.Whyisthat?StudentWell,whentheyarenothibernating,youcanfindtheminopenareas.Andtheyareprettyactiveduringtheday,whichmakesthemeasytoobserve,right?ProfessorUh-huh,sofirstlet’sdiscusstheEasternmarmots.Theyresid
4、ethroughouttheeasternregionofNorthAmericawherethereisatemperateclimate,wherethegrowingseasonlastsforatleastfivemonthsoftheyear,whichiswhentheydoalltheirmating,playingandeating.StudentOh,Isee.AtfirstIwasn’tsurewhatgrowingseasonmeant,justfromthereading.ButnowIgetit.It'stheamountoft
5、imeittakesforthemtogrow,right?Soitwouldbefivemonths?ProfessorUmm?Oh,uh…I’msorrybutno.Ithasnothingtodowiththat.It'snotaboutthetimeittakesforEasternmarmotstogrow.It’swhenthefoodisavailable.Thatiswhenit’snotcoveredinsnowandthereisnofrostcoveringthegrassand,umm,vegetativepartsofaplan
6、t’sherbsandtheflowersthemarmotsliketoeat.Sogrowingseasonreferstotheavailabilityofthefoodtheyeat,OK?SonowhowwouldyoudescribetheEasternmarmots’socialhabits?StudentWell,theyarereallyterritorial,andloners,andjustsoaggressiveevenwithotherEasternmarmots.Andtheirmatingritualisjustsoimpe
7、rsonal.ProfessorUh-huh?Nowwhentheyemergeinthespringfromhibernation,thematingprocessbegins.Forthem,well,theycometogethertomateandthentheyhttp://bailiedu.comgotheirseparateways.Thenaboutsixtoeightweeksafterbirth,theoffspringleavetheirmothers.StudentReally?Justsixweeks?Isthatpossibl
8、efortheoffspringtomakeitontheirownsoyoun
