练习材料：
Lesson 42-2 Recording an earthquake
But instrumentsfar more delicate than that were needed if any really serious advance was to bemade. The ideal to be aimed at was to devise an instrument that could recordwith a pen on paper, the movements of the ground or of the table as the quakepassed by. While I write my pen moves, but the paper keeps still. Withpractice, no doubt, I could in time learn to write by holding the pen stillwhile the paper moved. That sounds a silly suggestion, but that was preciselythe idea adopted in some of the early instruments (seismometers) for recordingearthquake waves. But when table, penholder and paper are all moving, how is itpossible to write legibly? The key to a solution of that problem lay in aneveryday observation.
rɪˈkɔːdɪŋ ən ˈɜːθkweɪk
bʌt ˈɪnstrəmənts fɑː mɔː ˈdɛlɪkɪt ðæn ðæt wɜː ˈniːdɪd ɪf ˈɛni
ˈrɪəli ˈsɪəriəs ədˈvɑːns wɒz tuː biː meɪd. ði aɪˈdɪəl tuː biː eɪmd æt wɒz tuː dɪˈvaɪz ən ˈɪnstrəmənt
ðæt kʊd ˈrɛkɔːd wɪð ə pɛn ɒn ˈpeɪpə, ðə ˈmuːvmənts ɒv ðə ɡraʊnd ɔːr ɒv ðə ˈteɪbᵊl æz ðə kweɪk pɑːst baɪ. waɪl aɪ raɪt maɪ pɛn muːvz, bʌt ðə
ˈpeɪpə kiːps stɪl. wɪð ˈpræktɪs, nəʊ daʊt, aɪ kʊd ɪn taɪm lɜːn tuː raɪt baɪ ˈhəʊldɪŋ
ðə pɛn stɪl waɪl ðə ˈpeɪpə muːvd. ðæt saʊndz ə ˈsɪli səˈʤɛsʧᵊn, bʌt ðæt wɒz prɪˈsaɪsli
ði aɪˈdɪə əˈdɒptɪd ɪn sʌm ɒv ði ˈɜːli ˈɪnstrəmənts (seismometers) fɔː rɪˈkɔːdɪŋ
ˈɜːθkweɪk weɪvz. bʌt wɛn ˈteɪbᵊl, ˈpɛnˌhəʊldər ænd ˈpeɪpər ɑːr ɔːl ˈmuːvɪŋ, haʊ ɪz ɪt ˈpɒsəbᵊl tuː raɪtˈlɛʤəbᵊli? ðə kiː tuː ə səˈluːʃᵊn ɒv ðæt ˈprɒbləm leɪ ɪn ən ˈɛvrideɪ ˌɒbzəˈveɪʃᵊn.
任务配置：L0 + L4
知识笔记：
单词：1、delicate：微妙的，棘手的，精美的，脆弱的，2、ideal：理想的，完美，3、seismometers：地震仪，4、legibly：清晰地，明了地，易读地，5、lay in：储备，储存，在于，
音标：
练习感悟：录了一遍就达标，非常爽
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