练习材料

Lesson 19-1 The stuff of dreams

It is fairly clear that sleeping period must have some function, and because there is so much of it the function would seem to e important. Speculations about is nature have been going on for literally thousands of years, and one odd finding that makes the problem puzzling is that it looks very much as if sleeping is not simply a matter of giving the body a rest. 'Rest', in terms of muscle relaxation and so on, can be achieved by a brief period lying, or even sitting down. The body's tissues are self-repairing and self-restoring to a degree, and function best when more or less continuously active. In fact a basic amount of movement occurs during sleep which is specifically concerned with preventing muscle inactivity.

/ˈlɛsən/ 19-1 /ðə/ /stʌf/ /ʌv/ /drimz/

/ɪt/ /ɪz/ /ˈfɛrli/ /klɪr/ /ðæt/ /ˈslipɪŋ/ /ˈpɪriəd/ /mʌst/ /hæv/ /sʌm/ /ˈfʌŋkʃən/, /ænd/ /bɪˈkɔz/ /ðɛr/ /ɪz/ /soʊ/ /mʌʧ/ /ʌv/ /ɪt/ /ðə/ /ˈfʌŋkʃən/ /wʊd/ /sim/ /tu/ /i/ /ɪmˈpɔrtənt/. /ˌspɛkjəˈleɪʃənz/ /əˈbaʊt/ /ɪz/ /ˈneɪʧər/ /hæv/ /bɪn/ /ˈgoʊɪŋ/ /ɑn/ /fɔr/ /ˈlɪtərəli/ /ˈθaʊzəndz/ /ʌv/ /jɪrz/, /ænd/ /wʌn/ /ɑd/ /ˈfaɪndɪŋ/ /ðæt/ /meɪks/ /ðə/ /ˈprɑbləm/ /ˈpʌzəlɪŋ/ /ɪz/ /ðæt/ /ɪt/ /lʊks/ /ˈvɛri/ /mʌʧ/ /æz/ /ɪf/ /ˈslipɪŋ/ /ɪz/ /nɑt/ /ˈsɪmpli/ /ə/ /ˈmætər/ /ʌv/ /ˈgɪvɪŋ/ /ðə/ /ˈbɑdi/ /ə/ /rɛst/. /rɛst/, /ɪn/ /tɜrmz/ /ʌv/ /ˈmʌsəl/ /ˌrilækˈseɪʃən/ /ænd/ /soʊ/ /ɑn/, /kæn/ /bi/ /əˈʧivd/ /baɪ/ /ə/ /brif/ /ˈpɪriəd/ /ˈlaɪɪŋ/, /ɔr/ /ˈivɪn/ /ˈsɪtɪŋ/ /daʊn/. /ðə/ /ˈbɑdiz/ /ˈtɪsˌjuz/ /ɑr/ /sɛlf/-/rɪˈpɛrɪŋ/ /ænd/ /sɛlf/-/rɪˈstɔrɪŋ/ /tu/ /ə/ /dɪˈgri/, /ænd/ /ˈfʌŋkʃən/ /bɛst/ /wɛn/ /mɔr/ /ɔr/ /lɛs/ /kənˈtɪnjuəsli/ /ˈæktɪv/. /ɪn/ /fækt/ /ə/ /ˈbeɪsɪk/ /əˈmaʊnt/ /ʌv/ /ˈmuvmənt/ /əˈkɜrz/ /ˈdʊrɪŋ/ /slip/ /wɪʧ/ /ɪz/ /spəˈsɪfɪkli/ /kənˈsɜrnd/ /wɪð/ /prɪˈvɛntɪŋ/ /ˈmʌsəl/ /ɪnækˈtɪvɪti/.