练习材料：
NCE--第四册
Lesson 42-1 Recording an earthquake
An earthquake comes like a thief in the night, without warning. It was necessary, therefore, to invent instruments that neither slumbered nor slept. Some devices were quite simple. One, for instance, consisted of rods of various lengths and thicknesses which would stand up end like ninepins. When a shock came, it shook the rigid table upon which these stood. If it were gentle, only the more unstable rods fell. If it were severe, they all fell. Thus the rods, by falling, and by the direction in which they fell, recorded for the slumbering scientist the strength of a shock that was too weak to waken him, and the direction from which it came.
[ən] [ˈɜːθkweɪk] [kʌmz] [laɪk] [ə] [θiːf] [ɪn] [ðə] [naɪt], [wɪˈðaʊt] [ˈwɔːnɪŋ]. [ɪt] [wɒz] [ˈnɛsɪsəri], [ˈðeəfɔː], [tuː] [ɪnˈvɛnt] [ˈɪnstrʊmənts] [ðæt] [ˈnaɪðə] [ˈslʌmbəd] [nɔː] [slɛpt]. [sʌm] [dɪˈvaɪsɪz] [wɜː] [kwaɪt] [ˈsɪmpl]. [wʌn], [fɔːr] [ˈɪnstəns], [kənˈsɪstɪd] [ɒv] [rɒdz] [ɒv] [ˈveərɪəs] [lɛŋθs] [ænd] [ˈθɪknɪsɪz] [wɪʧ] [wʊd] [stænd] [ʌp] [ɛnd] [laɪk] [ˈnaɪnpɪnz]. [wɛn] [ə] [ʃɒk] [keɪm], [ɪt] [ʃʊk] [ðə] [ˈrɪʤɪd] [ˈteɪbl] [əˈpɒn] [wɪʧ] [ðiːz] [stʊd]. [ɪf] [ɪt] [wɜː] [ˈʤɛntl], [ˈəʊnli] [ðə] [mɔːr] [ʌnˈsteɪbl] [rɒdz] [fɛl]. [ɪf] [ɪt] [wɜː] [sɪˈvɪə], [ðeɪ] [ɔːl] [fɛl]. [ðʌs] [ðə] [rɒdz], [baɪ] [ˈfɔːlɪŋ], [ænd] [baɪ] [ðə] [dɪˈrɛkʃən] [ɪn] [wɪʧ] [ðeɪ] [fɛl], [rɪˈkɔːdɪd] [fɔː] [ðə] [ˈslʌmbərɪŋ] [ˈsaɪəntɪst] [ðə] [strɛŋθ] [ɒv] [ə] [ʃɒk] [ðæt] [wɒz] [tuː] [wiːk] [tuː] [ˈweɪkən] [hɪm], [ænd] [ðə] [dɪˈrɛkʃən] [frɒm] [wɪʧ] [ɪt] [keɪm].
任务配置：
L0+L4
知识笔记 ：
练习感悟：
9.12
今天是课文第一部分，比较简单。注意单词英美音区别。自己容易弄混的两个词：invent（发明）和invite（邀请）。
简书到9.28才能恢复更新，这是后来补的。
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