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Dransparent animals let light pass through their bodies the same way light passethrough a window.These animals typically live between the surface of the ocean and adepth of about 3,300 feet-as far as most light can reach.Most of them are extremelydlice ca be dmaged ucnyayThesema liv through their lieTheyeeungethey're eating it,or unless something is eating them."And they are as clearg How doebecome through?Istrickierthan you might think.The objects around you are visible because they interacthgh Light typicallytravels in a straight line.But some materials slow and scaer (light,bouncingiaway from its original path.Others absorb light,stopping it dead in its tracks Bothscattering and absorption make an objeet look different from other objects around it.soyou can see it easily.But a transparent object doesn't absorb or scatter light,at least not very much.Light can pass through it without bending or stopping.That means a transparent objectdoesn't look very different from the surrounding air or water.You don't see it you seethe things behind it.To become transparent,an animal needs to keep its body from absorbing orscattering light.Living materials can stop light because they contain pigments (that absorb specific colors of light.But a transparent animal doesn't have pigments.soits tissues won't absorb light.According to Johnsen,avoiding absorption is actuallyeasy.The real challenge is preventing light from scattering.Animals are built of many different materials-skin,fat,and more-and light movesthrough each at a different speed.Every time light moves into a material with a newspeed,it bends and scatters.Transparent animals use different tricks to fight scattering.Some animals are simply very small or extremely flat.Without much tissue to scaerlight,it is easier to be see-through.Others build a large,clear mass of non-living jellylike(果冻状的)material and spread themselves over it..Larger transparent animals have the biggest challenge,because they have to makeallthe different tissues in their bodies slow down light exactly as much as water does.Theyneed to look uniform.But how they're doing it is still unknown.One thing is earforthese larger animals,staying transparent is an active process.When they die,they turn anon-transparent milky white.32.According to Paragraph transparent animalsB.can be easily damagedA.stay in groupsD.are beautiful ereaturesC.appear only in deep ocean英语·诚题卷六第7页（共12页）