练习材料：
Lesson 43-4 Are there strangers in space?
Fortunately, thereis a 'uniquely rational way' for us to communicate with other intelligentbeings, as Walter Sullivan has put it in his excellent book, We Are not Alone.This depends on the precise radio frequency of the 21-cm wavelength, or 1420megacycles per second. It is the natural frequency of emission of the hydrogenatoms in space and was discovered by us in 1951; it must be known to any kindof radio astronomer in the universe.
Once the existenceof this wave-length had been discovered, it was not long before its use as theuniquely recognizable broadcasting frequency for interstellar communication wassuggested. Without something of this kind, searching for intelligences on otherplanets would be like trying to meet a friend in London without a pre-arrangedrendezvous and absurdly wandering the streets in the hope of a chanceencounter.
ɑː ðeə ˈstreɪnʤəz ɪn speɪs?
ˈfɔːʧnɪtli, ðeər ɪz
ə juːˈniːkli ˈræʃənl weɪ fɔːr ʌs tuː kəˈmjuːnɪkeɪt wɪð ˈʌðər ɪnˈtɛlɪʤənt ˈbiːɪŋz,
æz ˈwɔːltə ˈsʌlɪv(ə)n hæz pʊt ɪt ɪn hɪz ˈɛksələnt bʊk, wiː ɑː nɒt əˈləʊn. ðɪs dɪˈpɛndz ɒn ðə prɪˈsaɪsˈreɪdɪəʊ ˈfriːkwənsi ɒv ðiː 21-cm ˈweɪvlɛŋθ, ɔː 1420 ˈmɛgəˈsaɪklz pɜː ˈsɛkənd. ɪtɪz ðə ˈnæʧrəl ˈfriːkwənsi ɒv ɪˈmɪʃən ɒv ðə ˈhaɪdrɪʤən ˈætəmz ɪn speɪs ænd wɒz dɪsˈkʌvədbaɪ ʌs ɪn 1951; ɪt mʌst biː nəʊn tuː ˈɛni kaɪnd ɒv ˈreɪdɪəʊ əsˈtrɒnəmər ɪn ðəˈjuːnɪvɜːs.
wʌns ði ɪgˈzɪstəns
ɒv ðɪs ˈweɪvlɛŋθ hæd biːn dɪsˈkʌvəd, ɪt wɒz nɒt lɒŋ bɪˈfɔːr ɪts juːz æz ðə
juːˈniːkli ˈrɛkəgnaɪzəbl ˈbrɔːdkɑːstɪŋ ˈfriːkwənsi fɔːr ˌɪntə(ː)ˈstɛlə kəˌmjuːnɪˈkeɪʃən
wɒz səˈʤɛstɪd. wɪˈðaʊt ˈsʌmθɪŋ ɒv ðɪs kaɪnd, ˈsɜːʧɪŋ fɔːr ɪnˈtɛlɪʤənsɪz ɒn ˈʌðə
ˈplænɪts wʊd biː laɪk ˈtraɪɪŋ tuː miːt ə frɛnd ɪn ˈlʌndən wɪˈðaʊt ə priː-əˈreɪnʤd
ˈrɒndɪvuː ænd əbˈsɜːdli ˈwɒndərɪŋ ðə striːts ɪn ðə həʊp ɒv ə ʧɑːns ɪnˈkaʊntə.
任务配置：L0 + L4
知识笔记：
单词：1、uniquely：独一无二，独特地，2、rational：合理的，有理，3、precise：精准的，准确，4、frequency：频率，频次，5、wavelength：波长，6、megacycle：大循环，7、emission：排放，发射，发出，8、atom：原子，9、recognizable：可识别的，10、interstellar：星际，11、pre-arranged：预先安排的，12、rendezvous：会和，13、absurdly：荒谬地，14、encounter：遇到，遭遇，遇见，15、wander：漫步，徘徊
音标：
练习感悟：今天的难度跟昨天的一样那么高，生词多，读起来拗口，而且语速又快，读了好多遍，录了好多遍才勉强达标。
网友评论