练习材料

Lesson 18-1 Porpoises

There has long been a superstition among mariners that porpoises will save drowning men by pushing them to the surface, or protect them from sharks by surrounding them in defensive formation. Marine Studio biologists have pointed out that, however intelligent they may be, it is probably a mistake to credit dolphins with any motive of lifesaving. On the occasions when they have pushed to shore an unconscious human being they have much more likely done it out of curiosity or for sport, as in riding the bow waves of a ship. In 1928 some porpoises were photographed working like beavers to push ashore a waterlogged mattress. If, as has been reported, they have protected humans from sharks, it may have been because curiosity attracted them and because the scent of a possible meal attracted the sharks.

/ˈlɛsən/ 18-1 /ˈpɔrpəsəz/ 

/ðɛr/ /hæz/ /lɔŋ/ /bɪn/ /ə/ /ˌsupərˈstɪʃən/ /əˈmʌŋ/ /ˈmɛrənərz/ /ðæt/ /ˈpɔrpəsəz/ /wɪl/ /seɪv/ /ˈdraʊnɪŋ/ /mɛn/ /baɪ/ /ˈpʊʃɪŋ/ /ðɛm/ /tu/ /ðə/ /ˈsɜrfəs/, /ɔr/ /prəˈtɛkt/ /ðɛm/ /frʌm/ /ʃɑrks/ /baɪ/ /səˈraʊndɪŋ/ /ðɛm/ /ɪn/ /dɪˈfɛnsɪv/ /fɔrˈmeɪʃən/. /məˈrin/ /ˈstudiˌoʊ/ /baɪˈɑləʤɪsts/ /hæv/ /ˈpɔɪntəd/ /aʊt/ /ðæt/, /ˌhaʊˈɛvər/ /ɪnˈtɛləʤənt/ /ðeɪ/ /meɪ/ /bi/, /ɪt/ /ɪz/ /ˈprɑbəbli/ /ə/ /mɪsˈteɪk/ /tu/ /ˈkrɛdət/ /ˈdɑlfənz/ /wɪð/ /ˈɛni/ /ˈmoʊtɪv/ /ʌv/ /ˈlaɪfˌseɪvɪŋ/. /ɑn/ /ði/ /əˈkeɪʒənz/ /wɛn/ /ðeɪ/ /hæv/ /pʊʃt/ /tu/ /ʃɔr/ /ən/ /ˌʌnˈkɑnʃəs/ /ˈhjumən/ /ˈbiɪŋ/ /ðeɪ/ /hæv/ /mʌʧ/ /mɔr/ /ˈlaɪkli/ /dʌn/ /ɪt/ /aʊt/ /ʌv/ /ˌkjʊriˈɑsəti/ /ɔr/ /fɔr/ /spɔrt/, /æz/ /ɪn/ /ˈraɪdɪŋ/ /ðə/ /baʊ/ /weɪvz/ /ʌv/ /ə/ /ʃɪp/. /ɪn/ 1928 /sʌm/ /ˈpɔrpəsəz/ /wɜr/ /ˈfoʊtəˌgræft/ /ˈwɜrkɪŋ/ /laɪk/ /ˈbivərz/ /tu/ /pʊʃ/ /əˈʃɔr/ /ə/ /ˈwɔtərˌlɑgd/ /ˈmætrəs/. /ɪf/, /æz/ /hæz/ /bɪn/ /ˌriˈpɔrtəd/, /ðeɪ/ /hæv/ /prəˈtɛktəd/ /ˈhjumənz/ /frʌm/ /ʃɑrks/, /ɪt/ /meɪ/ /hæv/ /bɪn/ /bɪˈkɔz/ /ˌkjʊriˈɑsəti/ /əˈtræktəd/ /ðɛm/ /ænd/ /bɪˈkɔz/ /ðə/ /sɛnt/ /ʌv/ /ə/ /ˈpɑsəbəl/ /mil/ /əˈtræktəd/ /ðə/ /ʃɑrks/.