练习材料：
Lesson 26-2 The past life of the earth
ˈlɛsn 26-2 ðə pɑːst laɪf ɒv ði ɜːθ
The remains of plants and animals that lived on land are much more rarely preserved, for there is seldom anything to cover them over. When you think of the innumerable birds that one sees flying about, not to mention the equally numerous small animals like field mice and voles which you do not see, it is very rarely that one comes across a dead body, except, of course, on the roads. They decompose and are quickly destroyed by the weather or eaten by some other creature.
It is almost always due to some very special circumstances that traces of land animals survive, as by falling into inaccessible caves, or into an ice crevasse, like the Siberian mammoths, when the whole animal is sometimes preserved, as in a refrigerator.
ðə rɪˈmeɪnz ɒv plɑːnts ænd ˈænɪməlz ðæt lɪvd ɒn lænd ɑː mʌʧ mɔː ˈreəli prɪˈzɜːvd, fɔː ðeər ɪz ˈsɛldəm ˈɛnɪθɪŋ tuː ˈkʌvə ðɛm ˈəʊvə. wɛn juː θɪŋk ɒv ði ɪˈnjuːmərəbl bɜːdz ðæt wʌn siːz ˈflaɪɪŋ baʊt, nɒt tuː ˈmɛnʃən ði ˈiːkwəli ˈnjuːmərəs smɔːl ˈænɪməlz laɪk fiːld maɪs ænd vəʊlz wɪʧ juː duː nɒt siː, ɪt ɪz ˈvɛri ˈreəli ðæt wʌn kʌmz əˈkrɒs ə dɛd ˈbɒdi, ɪkˈsɛpt, ɒv kɔːs, ɒn ðə rəʊdz. ðeɪ ˌdiːkəmˈpəʊz ænd ɑː ˈkwɪkli dɪsˈtrɔɪd baɪ ðə ˈwɛðər ɔːr ˈiːtn baɪ sʌm ˈʌðə ˈkriːʧə.
ɪt ɪz ˈɔːlməʊst ˈɔːlweɪz djuː tuː sʌm ˈvɛri ˈspɛʃəl ˈsɜːkəmstənsɪz ðæt ˈtreɪsɪz ɒv lænd ˈænɪməlz səˈvaɪv, æz baɪ ˈfɔːlɪŋ ˈɪntuː ˌɪnækˈsɛsəbl keɪvz, ɔːr ˈɪntuː ən aɪs krɪˈvæs, laɪk ðə saɪˈbɪərɪən ˈmæməθs, wɛn ðə həʊl ˈænɪməl ɪz ˈsʌmtaɪmz prɪˈzɜːvd, æz ɪn ə rɪˈfrɪʤəreɪtə.
曾在陆地上生活过的动植物的遗体被保存下来的更为罕见，因为陆地上几乎没有什么东西覆盖它们。你可以想象出天上有看得见的飞来飞去、数不清的鸟，地上有不显眼的无数的老鼠和田鼠之类的小动物，但是，除非在路上，很少有人遇到这些动物的尸体，因为它们腐败之后很快就被风化掉，或被别的动物吃掉了。
几乎总是由于某些特殊的条件，陆地动物的遗体才被存下来，如掉进难以到达的洞穴，或掉进冰河裂缝里，或者像西伯利亚长毛象那样掉进冰窟中，有时整个动物像被放在冰箱里一样被保存下来，著名的那林索夫卡长毛象就是这样被保存下来的，而且保存得很好。
任务配置：L0、L4
练习感悟：补前一天的基本任务。
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