练习材料：
L55-1: From theearth: Greetings
Recentdevelopments in astronomy have made it possible to detect planets in our ownMilky Way and in other galaxies. This is a major achievement because, inrelative terms, planets are very small and do not emit light. Finding planetsis proving hard enough, but finding life on them will prove infinitely moredifficult. The first question to answer is whether a planet can actuallysupport life. In our own solar system, for example, Venus is far too hot andMars is far too cold to support life. Only the Earth provides ideal conditions,and even here it has taken more than 4 billion years for plant and animal lifeto evolve. Whether a planet can support life depends on the size and brightnessof its star, that is its 'sun'. Imagine a star up to 20 times larger, brighterand hotter than our own sun. A planet would have to be a very long way from itto be capable of supporting life.
frɒm ði ɜːθ: ˈɡriːtɪŋz
ˈriːsnt dɪˈvɛləpmənts
ɪn əsˈtrɒnəmi hæv meɪd ɪt ˈpɒsəbᵊl tuː dɪˈtɛkt ˈplænɪts ɪn ˈaʊər əʊn ˈmɪlki weɪ
ænd ɪn ˈʌðə ˈɡæləksiz. ðɪs ɪz ə ˈmeɪʤər əˈʧiːvmənt bɪˈkɒz,
ɪn ˈrɛlətɪv tɜːmz, ˈplænɪts ɑː ˈvɛri smɔːl ænd duː nɒt ɪˈmɪt laɪt. ˈfaɪndɪŋ ˈplænɪts ɪz ˈpruːvɪŋ hɑːd ɪˈnʌf, bʌt ˈfaɪndɪŋ laɪf ɒn ðɛm wɪl
pruːv ˈɪnfɪnɪtli mɔː ˈdɪfɪkəlt. ðə fɜːst ˈkwɛsʧən tuː ˈɑːnsər ɪz ˈwɛðər ə ˈplænɪt kæn ˈækʧʊəli səˈpɔːt
laɪf. ɪn ˈaʊər əʊn ˈsəʊlə ˈsɪstəm, fɔːr ɪɡˈzɑːmpl, ˈviːnəs ɪz fɑː tuː hɒt ænd mɑːz ɪz fɑː tuː kəʊld tuː səˈpɔːt laɪf. ˈəʊnli ði ɜːθ
prəˈvaɪdz aɪˈdɪəl kənˈdɪʃᵊnz, ænd ˈiːvən hɪər ɪt hæz ˈteɪkən mɔː ðæn 4 ˈbɪljən
jɪəz fɔː plɑːnt ænd ˈænɪmᵊl laɪf tuː ɪˈvɒlv. ˈwɛðər ə
ˈplænɪt kæn səˈpɔːt laɪf dɪˈpɛndz ɒn ðə saɪz ænd ˈbraɪtnəs ɒv ɪts stɑː, ðæt ɪz ɪts sʌn. ɪˈmæʤɪn ə stɑːr ʌp tuː 20 taɪmz ˈlɑːʤə, ˈbraɪtər ænd ˈhɒtə ðæn ˈaʊər əʊn sʌn. əˈplænɪt wʊd hæv tuː biː ə ˈvɛri lɒŋ weɪ frɒm ɪt tuː biː ˈkeɪpəbᵊl ɒv səˈpɔːtɪŋlaɪf.
任务配置：L0 + L4
知识笔记：
单词：1、astronomy：天文学，天文，2、detect：探测，侦查，3、Milky Way：银河系，4、galaxies：星系，5、in relative terms：相对而言，6、infinitely：无限地，7、Venus：金星，8、Mars：火星，9、evolve：发展，演变，10、
音标：
练习感悟：这篇文章确实是我最近读的最简单的一篇了，语速不快，句子不拗口，生词也不多，录了一遍就勉强达标了。
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