练习材料
Lesson 43-2 Are there strangers in space?
Although perhaps only 1 per cent of the life that has started somewhere will develop into highly complex and intelligent patterns, so vast is the number of planets, that intelligent life is bound to be a natural part of the universe.
If then we are so certain that other intelligent life exists in the universe, why have we had no visitors from outer space yet? First of all, they may have come to this planet of ours thousands or millions of years ago, and found our then prevailing primitive state completely uninteresting to their own advanced knowledge. Professor Ronald Bracewell, a leading American radio astronomer, argued in Nature that such a superior civilization, on a visit to our own solar system, may have left an automatic messenger behind to await the possible awakening of an advanced civilization.
/ˈlɛsən/ 43-2 /ɑr/ /ðɛr/ /ˈstreɪnʤərz/ /ɪn/ /speɪs/?
/ˌɔlˈðoʊ/ /pərˈhæps/ /ˈoʊnli/ 1 /pɜr/ /sɛnt/ /əv/ /ðə/ /laɪf/ /ðət/ /həz/ /ˈstɑrtəd/ /ˈsʌmˌwɛr/ /wɪl/ /dɪˈvɛləp/ /ˈɪntə/ /ˈhaɪli/ /ˈkɑmplɛks/ /ənd/ /ɪnˈtɛləʤənt/ /ˈpætərnz/, /soʊ/ /væst/ /əz/ /ðə/ /ˈnʌmbər/ /əv/ /ˈplænəts/, /ðæt/ /ɪnˈtɛləʤənt/ /laɪf/ /əz/ /baʊnd/ /tə/ /bi/ /ə/ /ˈnæʧərəl/ /pɑrt/ /əv/ /ðə/ /ˈjunəˌvɜrs/.
/ɪf/ /ðɛn/ /wi/ /ər/ /soʊ/ /ˈsɜrtən/ /ðət/ /ˈʌðər/ /ɪnˈtɛləʤənt/ /laɪf/ /ɪgˈzɪsts/ /ɪn/ /ðə/ /ˈjunəˌvɜrs/, /waɪ/ /həv/ /wi/ /həd/ /noʊ/ /ˈvɪzətərz/ /frəm/ /ˈaʊtər/ /speɪs/ /jɛt/? /fɜrst/ /əv/ /ɔl/, /ðeɪ/ /meɪ/ /həv/ /kʌm/ /tə/ /ðɪs/ /ˈplænət/ /əv/ /ˈaʊərz/ /ˈθaʊzəndz/ /ɔr/ /ˈmɪljənz/ /əv/ /jɪrz/ /əˈgoʊ/, /ənd/ /faʊnd/ /ˈaʊər/ /ðɛn/ /prɪˈveɪlɪŋ/ /ˈprɪmətɪv/ /steɪt/ /kəmˈplitli/ /əˈnɪntrəstɪŋ/ /tə/ /ðɛr/ /oʊn/ /ədˈvænst/ /ˈnɑləʤ/. /prəˈfɛsər/ /ˈrɑnəld/ /ˈbreɪˌswɛl/, /ə/ /ˈlidɪŋ/ /əˈmɛrəkən/ /ˈreɪdiˌoʊ/ /əˈstrɑnəmər/, /ˈɑrgjud/ /ɪn/ /ˈneɪʧər/ /ðət/ /sʌʧ/ /ə/ /suˈpɪriər/ /ˌsɪvəlɪˈzeɪʃən/, /ɑn/ /ə/ /ˈvɪzət/ /tʊ/ /ˈaʊər/ /oʊn/ /ˈsoʊlər/ /ˈsɪstəm/, /meɪ/ /həv/ /lɛft/ /ən/ /ˌɔtəˈmætɪk/ /ˈmɛsənʤər/ /bɪˈhaɪnd/ /tʊ/ /əˈweɪt/ /ðə/ /ˈpɑsəbəl/ /əˈweɪkənɪŋ/ /əv/ /ən/ /ədˈvænst/ /ˌsɪvəlɪˈzeɪʃən/.
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