练习材料：
L42-2: Moderncavemen
The deepest knowncave in the world is the Gouffre Berger near Grenoble. It extends to a depth of3,723 feet. This immense chasm has been formed by an underground stream whichhas tunneled a course through a flaw in the rocks. The entrance to the cave ison a plateau in the Dauphine Alps. As it is only six feet across, it is barelynoticeable. The cave might never have been discovered had not the entrance beenspotted by the distinguished French pot-holer, Berger. Since its discovery, ithas become a sort of pot-holers' Everest. Though a number of descents have beenmade, much of it still remains to be explored. A team of pot-holers recentlywent down the Gouffre Berger. After entering the narrow gap on the plateau,they climbed down the steep sides of the cave until they came to a narrowcorridor. They had to edge their way along this, sometimes wading acrossshallow streams, or swimming across deep pools. Suddenly they came to awaterfall which dropped into an underground lake at the bottom of the cave.
ˈmɒdən ˈkeɪvmən
ðə ˈdiːpɪst nəʊn
keɪv ɪn ðə wɜːld ɪz ðə Gouffre ˈbɜːɡə nɪə Grenoble. ɪt ɪksˈtɛndz tuː ə dɛpθ ɒv 3,723 fiːt.
ðɪs ɪˈmɛns kæzm hæz biːn fɔːmd baɪ ən ˈʌndəɡraʊnd striːm wɪʧ hæz ˈtʌnld ə kɔːs θruː ə flɔː ɪn ðə rɒks.
ði ˈɛntrəns tuː ðə keɪv ɪz ɒn ə ˈplætəʊ ɪn ðə Dauphine ælps. æz ɪt ɪz ˈəʊnli sɪks
fiːt əˈkrɒs, ɪt ɪz ˈbeəli ˈnəʊtɪsəbᵊl. ðə keɪv maɪt ˈnɛvə hæv biːn dɪsˈkʌvəd
hæd nɒt ði ˈɛntrəns biːn ˈspɒtɪd baɪ ðə dɪsˈtɪŋɡwɪʃt frɛnʧ pɒt-ˈhəʊlə, ˈbɜːɡə. sɪns ɪts dɪsˈkʌvəri, ɪt hæz bɪˈkʌm ə sɔːt
ɒv pɒt-ˈhəʊləz ˈɛvərɪst. ðəʊ ə ˈnʌmbər ɒv dɪˈsɛnts hæv biːn meɪd, mʌʧ ɒv ɪt stɪl
rɪˈmeɪnz tuː biː ɪksˈplɔːd. ə tiːm ɒv pɒt-ˈhəʊləz ˈriːsntli wɛnt daʊn ðə
Gouffre ˈbɜːɡə. ˈɑːftər ˈɛntərɪŋ ðə ˈnærəʊ ɡæp ɒn ðə ˈplætəʊ, ðeɪ klaɪmd daʊn ðə stiːp
saɪdz ɒv ðə keɪv ənˈtɪl ðeɪ keɪm tuː ə ˈnærəʊ ˈkɒrɪdɔː. ðeɪ hæd tuː ɛʤ ðeə weɪ əˈlɒŋ
ðɪs, ˈsʌmtaɪmz ˈweɪdɪŋ əˈkrɒs ˈʃæləʊ striːmz, ɔː ˈswɪmɪŋ əˈkrɒs diːp puːlz. ˈsʌdnli
ðeɪ keɪm tuː ə ˈwɔːtəfɔːl wɪʧ drɒpt ˈɪntuː ən ˈʌndəɡraʊnd leɪk æt ðə ˈbɒtəm ɒv ðə keɪv.
任务配置：L0 + L4
知识笔记：
单词：1、chasm：裂缝，深裂口，2、flaw：缺陷，裂痕，裂隙，3、plateau：高原，高地，4、distinguished：杰出的，卓著，5、Everest：珠峰，6、corridor：走廊，楼道，7、wading：涉水，8、
音标：
练习感悟：终于又补齐了，每天要读这种难度的文章两篇，还是很花费时间精力的，明天要出去逛，不知道会不会搞到最后又要补。希望不要了。
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