练习材料：
Lesson 19-1 The stuff of dreams
It is fairly clearthat the sleeping period must have some function, and because there is so muchof it the function would seem to be important. Speculations about its naturehave been going on for literally thousands of years, and one odd finding thatmakes the problem puzzling is that it looks very much as if sleeping is notsimply a matter of giving the body a rest. 'Rest', in terms of musclerelaxation and so on, can be achieved by a brief period lying, or even sittingdown. The body's tissues are self-repairing and self-restoring to a degree, andfunction best when more or less continuously active. In fact a basic amount ofmovement occurs during sleep which is specifically concerned with preventingmuscle inactivity.
ðə stʌf ɒv driːmz
ɪt ɪz ˈfeəli klɪə
ðæt ˈsliːpɪŋ ˈpɪəriəd mʌst hæv sʌm ˈfʌŋkʃᵊn, ænd bɪˈkɒz ðeər ɪz səʊ mʌʧ ɒv ɪt ðə
ˈfʌŋkʃᵊn wʊd siːm tuː iː ɪmˈpɔːtənt. ˌspɛkjəˈleɪʃᵊnz əˈbaʊt ɪz ˈneɪʧə hæv biːn
ˈɡəʊɪŋ ɒn fɔː ˈlɪtərəli ˈθaʊzəndz ɒv jɪəz,
ænd wʌn ɒd ˈfaɪndɪŋ ðæt meɪks ðə ˈprɒbləm ˈpʌzlɪŋ ɪz ðæt ɪt lʊks ˈvɛri mʌʧ æz ɪf
ˈsliːpɪŋ ɪz nɒt ˈsɪmpli ə ˈmætər ɒv ˈɡɪvɪŋ ðə ˈbɒdi ə rɛst. rɛst, ɪn tɜːmz ɒv ˈmʌsᵊl
ˌriːlækˈseɪʃᵊn ænd səʊ ɒn, kæn biː əˈʧiːvd baɪ ə briːf ˈpɪəriəd ˈlaɪɪŋ, ɔːr
ˈiːvən ˈsɪtɪŋ daʊn. ðə ˈbɒdiz ˈtɪʃuːz ɑː sɛlf-rɪˈpeərɪŋ ænd sɛlf-rɪsˈtɔːrɪŋ tuː ə dɪˈɡriː, ænd ˈfʌŋkʃᵊn bɛst wɛn mɔːr ɔː lɛs kənˈtɪnjuəsliˈæktɪv. ɪn fækt ə ˈbeɪsɪk əˈmaʊnt ɒv ˈmuːvmənt əˈkɜːz ˈdjʊərɪŋ sliːp wɪʧ ɪz spəˈsɪfɪkᵊlikənˈsɜːnd wɪð prɪˈvɛntɪŋ ˈmʌsᵊl ˌɪnækˈtɪvəti.
任务配置：L0 + L4
知识笔记：
单词：1、stuff：东西，材料，填塞，本质，2、fairly：相当，比较，3、speculation：推测，学说，4、literally：字面上的，按照字面，确实地，真正地，5、in terms of：按照，6、brief：简短的，简要，7、tissue：组织，薄纸，8、amount：数量，等于，合计，9、specifically：具体来说，特别，10、concern：忧虑，关心，有关，11、
音标：
练习感悟：这篇文章，其实还是比较拗口的，但是录了一遍就达标了，还是挺爽的。
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