1.练习材料

Lesson 55 From the earth: Greetings

Alternatively, if the star were small, the life-supporting planet would have to have a close orbit round it and also provide the perfect conditions for life forms to develop. But how would we find such a planet? At present, there is no telescope in existence that is capable of detecting the presence of life. The development of such a telescope will be one of the great astronomical projects of the twenty-first century.It is impossible to look for life on another planet using earth-based telescopes. Our own warm atmosphere and the heat generated by the telescope would make it impossible to detect objects as small as planets.Even a telescope in orbit  round the earth, like the very successful Hubble telescope, would not be suitable because of the dust particles in our solar system.

2.任务配置:L0

3.知识笔记

(1)查音标

/ˈlɛsn/ 55 /frɒm/ /ði/ /ɜːθ:/ /ˈgriːtɪŋz/

/ɔːlˈtɜːnətɪvli/, /ɪf/ /ðə/ /stɑː/ /wɜː/ /smɔːl/, /ðə/ /laɪf/-/səˈpɔːtɪŋ/ /ˈplænɪt/ /wʊd/ /hæv/ /tuː/ /hæv/ /ə/ /kləʊs/ /ˈɔːbɪt/ /raʊnd/ /ɪt/ /ænd/ /ˈɔːlsəʊ/ /prəˈvaɪd/ /ðə/ /ˈpɜːfɪkt/ /kənˈdɪʃənz/ /fɔː/ /laɪf/ /fɔːmz/ /tuː/ /dɪˈvɛləp/. /bʌt/ /haʊ/ /wʊd/ /wiː/ /faɪnd/ /sʌʧ/ /ə/ /ˈplænɪt/? /æt/ /ˈprɛznt/, /ðeər/ /ɪz/ /nəʊ/ /ˈtɛlɪskəʊp/ /ɪn/ /ɪgˈzɪstəns/ /ðæt/ /ɪz/ /ˈkeɪpəbl/ /ɒv/ /dɪˈtɛktɪŋ/ /ðə/ /ˈprɛzns/ /ɒv/ /laɪf/. /ðə/ /dɪˈvɛləpmənt/ /ɒv/ /sʌʧ/ /ə/ /ˈtɛlɪskəʊp/ /wɪl/ /biː/ /wʌn/ /ɒv/ /ðə/ /greɪt/ /ˌæstrəˈnɒmɪkəl/ /ˈprɒʤɛkts/ /ɒv/ /ðə/ /ˈtwɛnti/-/fɜːst/ /ˈsɛnʧʊri/./ɪt/ /ɪz/ /ɪmˈpɒsəbl/ /tuː/ /lʊk/ /fɔː/ /laɪf/ /ɒn/ /əˈnʌðə/ /ˈplænɪt/ /ˈjuːzɪŋ/ /ɜːθ/-/beɪst/ /ˈtɛlɪskəʊps/. /ˈaʊər/ /əʊn/ /wɔːm/ /ˈætməsfɪər/ /ænd/ /ðə/ /hiːt/ /ˈʤɛnəreɪtɪd/ /baɪ/ /ðə/ /ˈtɛlɪskəʊp/ /wʊd/ /meɪk/ /ɪt/ /ɪmˈpɒsəbl/ /tuː/ /dɪˈtɛkt/ /ˈɒbʤɪkts/ /æz/ /smɔːl/ /æz/ /ˈplænɪts/./ˈiːvən/ /ə/ /ˈtɛlɪskəʊp/ /ɪn/ /ˈɔːbɪt/ /raʊnd/ /ði/ /ɜːθ/, /laɪk/ /ðə/ /ˈvɛri/ /səkˈsɛsfʊl/ Hubble /ˈtɛlɪskəʊp/, /wʊd/ /nɒt/ /biː/ /ˈsjuːtəbl/ /bɪˈkɒz/ /ɒv/ /ðə/ /dʌst/ /ˈpɑːtɪklz/ /ɪn/ /ˈaʊə/ /ˈsəʊlə/ /ˈsɪstɪm/.