《贸易客源国概况》课件——4-7-2 极其勤劳的海洋动物The Extremely Industrious Sea Animal.pptx

TheExtremelyIndustriousSeaAnimalLecturer:GuoZhiwen

Beaver,whichisakindofobeserodent,lookslikearat.Itisalargerodent,430~635mminlength,225~425mmintaillength,5~10kginweight,and17kginweightforthebigone.

Therearetwotreasuresonthebeaver.Oneistherawmaterialusedtomakeperfume.Theotherisbeaversoilyandshinyfur,whichisusedtomakeleathergoods.

Nowadays,inCanada,beaverimagescanbeseeneverywhere:thebackofthecoin,clothingbrandlogo(roots),mascotandsoon.

Beavershavetheabilitytotransformtheirhabitat.Wherebeaversliveorhavelived,thereisalwaysapond,lakeorswamp.Beaversalwaysusebranches,stonesandsoftmudtobuilddikestoblockthewayofstreams.Smallonescanmergeintoponds,andlargeonescanbecomelakeswithanareaofseveralhectares.

Whenenteringanewhabitatorwhenthewaterlevelofthehabitatdrops,beaverswillusebranches,mudandotherdamstostorewater,soastoprotectthecaveentrancefromtheinvasionofnaturalenemies.

Peoplelovebeaver,anduse“busybeaver”todescribeaverybusy,assiduous,orhardworkingperson.Takenfromthephrase“busyasabeaver”,referringtobeavers’reputationforbeingextremelyindustrious.

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