练习材料：
Lesson43 Over the South Pole
In 1929, threeyears after his flight over the North Pole, the American explorer, R.
E. Byrd,successfully flew over the South Pole for the first time. Though, at first,Byrd and his men were able to take a great many photographs of the mountainsthat lay below, they soon ran into serious trouble. At one point, it seemedcertain that their plane would crash. It could only get over the mountains ifit rose to 10,000 feet. Byrd at once ordered his men to throw out two heavyfood sacks. The plane was then able to rise and it cleared the mountains by 400feet. Byrd now knew that he would be able to reach the South Pole which was 300miles away, for there were no more mountains in sight. The aircraft was able tofly over the endless white plains without difficulty.
ɪn 1929, θriː jɪəz ˈɑːftə hɪz flaɪt ˈəʊvə ðə nɔːθ pəʊl, ði əˈmɛrɪkən ɪksˈplɔːrə, ɑː. iː. bɜːd, səkˈsɛsfʊli fluː ˈəʊvə ðə saʊθ pəʊl fə ðə fɜːst taɪm. ðəʊ, ət fɜːst, bɜːd ənd ɪz mɛn wər ˈeɪbl tə teɪk ə greɪt ˈmɛni ˈfəʊtəgrɑːfs əv ðə ˈmaʊntɪnz ðət leɪ bɪˈləʊ, ðeɪ suːn ræn ˈɪntə ˈsɪərɪəs ˈtrʌbl. ət wʌn pɔɪnt, ɪt siːmd ˈsɜːtn ðət ðeə pleɪn wəd kræʃ. ɪt kəd ˈəʊnli gɛt ˈəʊvə ðə ˈmaʊntɪnz ɪf ɪt rəʊz tʊ 10,000 fiːt. bɜːd ət wʌns ˈɔːdəd ɪz mɛn tə θrəʊ aʊt tuː ˈhɛvi fuːd sæks. ðə pleɪn wəz ðɛn ˈeɪbl tə raɪz ənd ɪt klɪəd ðə ˈmaʊntɪnz baɪ 400 fiːt. bɜːd naʊ njuː ðət hi wəd bi ˈeɪbl tə riːʧ ðə saʊθ pəʊl wɪʧ wɒz 300 maɪlz əˈweɪ, fə ðə wə nəʊ mɔː ˈmaʊntɪnz ɪn saɪt. ði ˈeəkrɑːft wəz ˈeɪbl tə flaɪ ˈəʊvə ði ˈɛndlɪs waɪtpleɪnz wɪˈðaʊt ˈdɪfɪkəlti.
任务配置：L0+L1+L4
知识笔记：
单词：1、crash：碰撞，2、aircraft：飞机，3、plains：平原，4、sacks：麻袋
音标： /s/ 双唇微开，上下齿接近于合拢状态，舌尖抵住下龈，气流从牙缝送出。
练习感悟： 语速越来越快，读起来要达到原录音的时间越来越难，慢慢挑战要开始了。
