雅思阅读真题（Part 2）
Part 2 · 考频：高频 · 最近考试：2026.8.15/2021.10.23/2020.10.10/2020.7.18/2019.5.18/2019.11.23ASia/2015.8.13
A
Birds have many unique design features that enable them to perform such amazing feats of endurance. They are equipped with lightweight, hollow bones, intricately designed feathers providing both lift and thrust for rapid flight, navigation systems superior to any that man has developed, and an ingenious heat conserving design that, among other things, concentrates all blood circulation beneath layers of warm, waterproof plumage, leaving them fit to face life in the harshest of climates. Their respiratory systems have to perform efficiently during sustained flights at altitude, so they have a system of extracting oxygen from their lungs that far exceeds that of any other animal. During the later stages of the summer breeding season, when food is plentiful their bodies are able to accumulate considerable layers of fat, in order to provide sufficient energy for their long migratory flights.
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答案：physical characteristics that allow birds to migrate
原文定位：Birds have many unique design features that enable them to perform such amazing feats of endurance. They are equipped with lightweight, hollow bones, intricately designed feathers providing both lift and thrust for rapid flight, navigation systems superior to any that man has developed, and an ingenious heat conserving design;Their respiratory systems have to perform efficiently during sustained flights at altitude;their bodies are able to accumulate considerable layers of fat
同义替换：「physical characteristics」↔「design features」，「allow birds to migrate」↔「enable them to perform such amazing feats of endurance」
答案：the main reason why birds migrate
原文定位：The fundamental reason that birds migrate is to find adequate food during the winter months when it is in short supply
同义替换：「main reason」↔「fundamental reason」
答案：the unexplained rejection of closer feeding ground
原文定位：One puzzling fact is that many birds journey much further than would be necessary just to find food and good weather;Yet, en route to their final destination in far-flung southern latitudes, all these individuals overfly other areas of seemingly suitable habitat spanning two hemispheres
同义替换：「unexplained」↔「puzzling fact」，「rejection of closer feeding ground」↔「overfly other areas of seemingly suitable habitat」
答案：mysterious migration despite lack of teaching
原文定位：One of the greatest mysteries is how young birds know how to find the traditional wintering areas without parental guidance;It is mind boggling to consider that, once raised by its host species, the young cuckoo makes its own way to ancestral wintering grounds in the tropics before returning single-handed to northern Europe the next season
同义替换：「mysterious migration」↔「one of the greatest mysteries」，「despite lack of teaching」↔「without parental guidance」
答案：research findings on how birds migrate
原文定位：Mounting evidence has confirmed that birds use the positions of the sun and stars to obtain compass directions. They seem also to be able to detect the earth's magnetic field;Experiments have shown that after being taken thousands of miles over an unfamiliar landmass, birds are still capable of returning rapidly to nest sites. Such phenomenal powers are the product of computing a number of sophisticated cues
同义替换：「research findings」↔「Mounting evidence」
答案：the best moment to migrate
原文定位：Nevertheless, all journeys involve considerable risk, and part of the skill in arriving safely is setting off at the right time. This means accurate weather forecasting, and utilizing favorable winds
同义替换：「the best moment」↔「the right time」，「to migrate」↔「all journeys」
答案：successful migration despite trouble of wind
原文定位：In one instance a Welsh Manx shearwater carried to America and released was back in its burrow on Skokholm Island;one day before a letter announcing its release! Conversely, each autumn a small number of North American birds are blown across the Atlantic by fast-moving westerly tail winds. Not only do they arrive safely in Europe, but;some make it back to North America the following spring
同义替换：「successful migration」↔「arrive safely」，「despite trouble of wind」↔「birds are blown across the Atlantic by fast‑moving westerly tail winds」
答案：Birds often fly further than they need to.,Birds flying at night need less water.
原文定位：One puzzling fact is that many birds journey much further than would be necessary just to find food and good weather;Daytime predators are avoided and the danger of dehydration due to flying for long periods in warm, sunlit skies is reduced
同义替换：「fly further than they need to」↔「further than would be necessary」
答案：parental guidance
原文定位：One of the greatest mysteries is how young birds know how to find the traditional wintering areas without parental guidance
同义替换：「without」↔「without」，「young birds」↔「young birds」，「wintering grounds」↔「wintering grounds」
答案：compass
原文定位：Mounting evidence has confirmed that birds use the positions of the sun and stars to obtain compass directions
同义替换：「Evidence」↔「evidence」，「tell directions」↔「obtain compass directions」
答案：predators
原文定位：Traveling at night provides other benefits. Daytime predators are avoided and the danger of dehydration due to flying for long periods in warm, sunlit skies is reduced
同义替换：「advantage」↔「benefits」，「avoid」↔「avoid」
答案：visible
原文定位：Often birds react to weather changes before there is any visible sign of them
同义替换：「signs」↔「sign」