练习材料：
Lesson 75 SOS
When a light passenger plane flew off course some time ago, it crashed in the mountains and its pilot was killed. The only passengers, a young woman and her two baby daughters, were unhurt. It was the middle of winter. Snow lay thick on the ground. The woman knew that the nearest village was miles away. When it grew dark. she turned a suitcase into a bed and put the children inside it, covering them with all the clothes she could find. During the night, it got terribly cold. The woman kept as near as she could to the children and even tried to get into the case herself, but it was too small. Early next morning she heard planes passing overhead and wondered how she could send a signal. Then she had an idea. She stamped out the letters' SOS' in the snow. Fortunately, a pilot saw the signal and sent a message by radio to the nearest town. It was not long before a helicopter arrived on the scene to rescue the survivors of the plane crash.
ɛs-oʊ-ɛs
wɛn ə laɪt ˈpæsənʤər pleɪn flu ɔf kɔrs sʌm taɪm əˈgoʊ, ɪt kræʃt ɪn ðəˈmaʊntənz ænd ɪts ˈpaɪlət wʌz kɪld. ði ˈoʊnli ˈpæsənʤərz, ə jʌŋ ˈwʊmən ænd hɜr tu ˈbeɪbi ˈdɔtərz, wɜr ənˈhɜrt. ɪt wʌz ðəˈmɪdəl ʌv ˈwɪntər. snoʊ leɪ θɪk ɑn ðə graʊnd. ðəˈwʊmən nu ðæt ðəˈnɪrəst ˈvɪlɪʤ wʌz maɪlz əˈweɪ. wɛn ɪt gru dɑrk. ʃi tɜrnd əˈsutˌkeɪs ˈɪntu ə bɛd ænd pʊt ðəˈʧɪldrən ɪnˈsaɪd ɪt, ˈkʌvərɪŋðɛm wɪðɔl ðə kloʊz ʃi kʊd faɪnd. ˈdʊrɪŋðə naɪt, ɪt gɑt ˈtɛrəbli koʊld. ðəˈwʊmən kɛpt æz nɪr æz ʃi kʊd tu ðəˈʧɪldrən ænd ˈivɪn traɪd tu gɛt ˈɪntu ðə keɪs hərˈsɛlf, bʌt ɪt wʌz tu smɔl. ˈɜrli nɛkst ˈmɔrnɪŋ ʃi hɜrd pleɪnz ˈpæsɪŋ ˈoʊvərˌhɛd ænd ˈwʌndərd haʊʃi kʊd sɛnd əˈsɪgnəl. ðɛn ʃi hæd ən aɪˈdiə. ʃi stæmpt aʊt ðəˈlɛtərz ɛs-oʊ-ɛs ɪn ðə snoʊ. ˈfɔrʧənətli, əˈpaɪlət sɔ ðəˈsɪgnəl ænd sɛnt əˈmɛsɪʤ baɪˈreɪdiˌoʊ tu ðəˈnɪrəst taʊn. ɪt wʌz nɑt lɔŋ bɪˈfɔr əˈhɛlɪˌkɑptər əˈraɪvd ɑn ðə sin tu ˈrɛskju ðə sərˈvaɪvərz ʌv ðə pleɪn kræʃ.
任务配置：L0+L4
知识笔记：
thick 厚的
miles away 几英里之外
terribly 非常；极度地
stamp 印上；踩
helicopter 直升飞机
scene 现场
rescue 营救
