20190405 周五 Day177

练习材料：

原文
[Day 177 2019-04-05]
L42-1: Modern cavemen
Cave exploration, or pot-holing, as it has come to be known, is a relatively new sport. Perhaps it is the desire for solitude or the chance of making an unexpected discovery that lures引诱 people down to the depths of the earth. It is impossible to give a satisfactory explanation解释 for a pot-holer's motives. For him, caves have the same peculiar 奇怪的fascination入迷 which high mountains have for the climber. They arouse instincts which can only be dimly understood.
Exploring really deep caves is not a task for the Sunday afternoon rambler漫步者. Such undertakings require the precise planning and foresight先见之明 of military operations. It can take as long as eight days to rig up草草搭建 rope ladders and to establish supply bases before a descent下降 can be made into a very deep cave. Precautions预防措施 of this sort are necessary, for it is impossible to foretell the exact nature of the difficulties which will confront the pot-holer.

2019-04-05]
ɛl42-1: ˈmɒdən ˈkeɪvmən
keɪv ˌɛksplɔːˈreɪʃən, ɔː pɒt-ˈhəʊlɪŋ, æz ɪt hæz kʌm tuː biː nəʊn, ɪz ə ˈrɛlətɪvli njuː spɔːt. pəˈhæps ɪt ɪz ðə dɪˈzaɪə fɔː ˈsɒlɪtjuːd ɔː ðə ʧɑːns ɒv ˈmeɪkɪŋ ən ˌʌnɪksˈpɛktɪd dɪsˈkʌvəri ðæt ljʊəz ˈpiːpl daʊn tuː ðə dɛpθs ɒv ði ɜːθ. ɪt ɪz ɪmˈpɒsəbl tuː gɪv ə ˌsætɪsˈfæktəri ˌɛkspləˈneɪʃən fɔːr ə pɒt-ˈhəʊləz ˈməʊtɪvz. fɔː hɪm, keɪvz hæv ðə seɪm pɪˈkjuːliə ˌfæsɪˈneɪʃən wɪʧ haɪ ˈmaʊntɪnz hæv fɔː ðə ˈklaɪmə. ðeɪ əˈraʊz ˈɪnstɪŋkts wɪʧ kæn ˈəʊnli biː ˈdɪmli ˌʌndəˈstʊd.
ɪksˈplɔːrɪŋ ˈrɪəli diːp keɪvz ɪz nɒt ə tɑːsk fɔː ðə ˈsʌndeɪ ˈɑːftəˈnuːn ˈræmblə. sʌʧ ˌʌndəˈteɪkɪŋz rɪˈkwaɪə ðə prɪˈsaɪz ˈplænɪŋ ænd ˈfɔːsaɪt ɒv ˈmɪlɪtəri ˌɒpəˈreɪʃənz. ɪt kæn teɪk æz lɒŋ æz eɪt deɪz tuː rɪg ʌp rəʊp ˈlædəz ænd tuː ɪsˈtæblɪʃ səˈplaɪ ˈbeɪsiːz bɪˈfɔːr ə dɪˈsɛnt kæn biː meɪd ˈɪntuː ə ˈvɛri diːp keɪv. prɪˈkɔːʃənz ɒv ðɪs sɔːt ɑː ˈnɛsɪsəri, fɔːr ɪt ɪz ɪmˈpɒsəbl tuː fɔːˈtɛl ði ɪgˈzækt ˈneɪʧər ɒv ðə ˈdɪfɪkəltiz wɪʧ wɪl kənˈfrʌnt ðə pɒt-ˈhəʊlə.
23。 95 72

任务配置：

L0+L4

知识笔记：

练习感悟（做完事情的感触和吐槽 ，用时）：

开始时刻：1300
结束时刻：1429
用时：90