1.練習(xí)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.任務(wù)配置:L0

3.知識(shí)筆記

(1)查音標(biāo)

/?l?sn/ 55 /fr?m/ /ei/ /??θ:/ /?gri?t??z/

/??l?t??n?t?vli/, /?f/ /e?/ /stɑ?/ /w??/ /sm??l/, /e?/ /la?f/-/s??p??t??/ /?pl?n?t/ /w?d/ /h?v/ /tu?/ /h?v/ /?/ /kl??s/ /???b?t/ /ra?nd/ /?t/ /?nd/ /???ls??/ /pr??va?d/ /e?/ /?p??f?kt/ /k?n?d???nz/ /f??/ /la?f/ /f??mz/ /tu?/ /d??v?l?p/. /b?t/ /ha?/ /w?d/ /wi?/ /fa?nd/ /s??/ /?/ /?pl?n?t/? /?t/ /?pr?znt/, /ee?r/ /?z/ /n??/ /?t?l?sk??p/ /?n/ /?g?z?st?ns/ /e?t/ /?z/ /?ke?p?bl/ /?v/ /d??t?kt??/ /e?/ /?pr?zns/ /?v/ /la?f/. /e?/ /d??v?l?pm?nt/ /?v/ /s??/ /?/ /?t?l?sk??p/ /w?l/ /bi?/ /w?n/ /?v/ /e?/ /gre?t/ /??str??n?m?k?l/ /?pr???kts/ /?v/ /e?/ /?tw?nti/-/f??st/ /?s?n??ri/./?t/ /?z/ /?m?p?s?bl/ /tu?/ /l?k/ /f??/ /la?f/ /?n/ /??n?e?/ /?pl?n?t/ /?ju?z??/ /??θ/-/be?st/ /?t?l?sk??ps/. /?a??r/ /??n/ /w??m/ /??tm?sf??r/ /?nd/ /e?/ /hi?t/ /???n?re?t?d/ /ba?/ /e?/ /?t?l?sk??p/ /w?d/ /me?k/ /?t/ /?m?p?s?bl/ /tu?/ /d??t?kt/ /??b??kts/ /?z/ /sm??l/ /?z/ /?pl?n?ts/./?i?v?n/ /?/ /?t?l?sk??p/ /?n/ /???b?t/ /ra?nd/ /ei/ /??θ/, /la?k/ /e?/ /?v?ri/ /s?k?s?sf?l/ Hubble /?t?l?sk??p/, /w?d/ /n?t/ /bi?/ /?sju?t?bl/ /b??k?z/ /?v/ /e?/ /d?st/ /?pɑ?t?klz/ /?n/ /?a??/ /?s??l?/ /?s?st?m/.