20190501 周三 Day202

练习材料：

原文
[Day 202 2019-05-01]
L51-1: Predicting the future
Predicting the future is notoriously众所周知的 difficult. Who could have imagined, in the mid 1970s, for example, that by the end of the 20th century, computers would be as common in people's homes as TV sets? In the 1970s, computers were common enough, but only in big business, government departments, and large organizations. These were the so-called mainframe主机 machines. Mainframe computers were very large indeed, often occupying whole air-conditioned rooms, employing full-time technicians and run on specially-written software. Though these large machines still exist, many of their functions have been taken over by small powerful personal computers, commonly known as PCs.In 1975, a primitive machine called the Altair, was launched in the USA.

2019-05-01]
ɛl51-1: prɪˈdɪktɪŋ ðə ˈfjuːʧə
prɪˈdɪktɪŋ ðə ˈfjuːʧər ɪz nəʊˈtɔːrɪəsli ˈdɪfɪkəlt. huː kʊd hæv ɪˈmæʤɪnd, ɪn ðə mɪd 1970ɛs, fɔːr ɪgˈzɑːmpl, ðæt baɪ ði ɛnd ɒv ðiː 20th ˈsɛnʧʊri, kəmˈpjuːtəz wʊd biː æz ˈkɒmən ɪn ˈpiːplz həʊmz æz ˌtiːˈviː sɛts? ɪn ðiː 1970ɛs, kəmˈpjuːtəz wɜː ˈkɒmən ɪˈnʌf, bʌt ˈəʊnli ɪn bɪg ˈbɪznɪs, ˈgʌvnmənt dɪˈpɑːtmənts, ænd lɑːʤ ˌɔːgənaɪˈzeɪʃənz. ðiːz wɜː ðə ˈsəʊˈkɔːld ˈmeɪnfreɪm məˈʃiːnz. ˈmeɪnfreɪm kəmˈpjuːtəz wɜː ˈvɛri lɑːʤ ɪnˈdiːd, ˈɒf(ə)n ˈɒkjʊpaɪɪŋ həʊl ˈeəkənˌdɪʃ(ə)nd ruːmz, ɪmˈplɔɪɪŋ fʊl-taɪm tɛkˈnɪʃənz ænd rʌn ɒn ˈspɛʃəli-ˈrɪtn ˈsɒftweə. ðəʊ ðiːz lɑːʤ məˈʃiːnz stɪl ɪgˈzɪst, ˈmɛni ɒv ðeə ˈfʌnŋkʃənz hæv biːn ˈteɪkən ˈəʊvə baɪ smɔːl ˈpaʊəfʊl ˈpɜːsnl kəmˈpjuːtəz, ˈkɒmənli nəʊn æz piː-siːz.ɪn 1975, ə ˈprɪmɪtɪv məˈʃiːn kɔːld ði ˈælteə, wɒz lɔːnʧt ɪn ðə juː-ɛs-eɪ.

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：
结束时刻：
用时：69