练习材料：
Lesson 94 Future champions
Experiments have proved that children can be instructed in swimming at a very early age. At a special swimming pool in Los Angeles, children become expert at holding their breath under water even before they can walk. Babies of two months old do not appear to be reluctant to enter the water, It is not long before they are so accustomed to swimming that they can pick up weights from the floor of the pool. A game that is very popular with these young swimmers is the underwater tricycle race. Tricycles are lined up on the floor of the pool seven feet under water. The children compete against each other to reach the other end of the pool. Many pedal their tricycles, but most of them prefer to push or drag them. Some children can cover the whole length of the pool without coming up for breath even once. Whether they will ever become future Olympic champions, only time will tell. Meanwhile, they should encourage those among us who cannot swim five yards before they are gasping for air.
ˈfjuʧər ˈʧæmpiənz
ɪkˈspɛrəmənts hæv pruvd ðæt ˈʧɪldrən kæn bi ɪnˈstrʌktɪd ɪn ˈswɪmɪŋ æt əˈvɛri ˈɜrli eɪʤ. æt əˈspɛʃəl ˈswɪmɪŋ pul ɪn lɔs ˈænʤələs, ˈʧɪldrən bɪˈkʌm ˈɛkspərt æt ˈhoʊldɪŋ ðɛr brɛθ ˈʌndər ˈwɔtər ˈivɪn bɪˈfɔr ðeɪ kæn wɔk. ˈbeɪbiz ʌv tu mʌnθs oʊld du nɑt əˈpɪr tu bi rɪˈlʌktənt tu ˈɛntər ðəˈwɑtər, ɪt ɪz nɑt lɔŋ bɪˈfɔr ðeɪɑr soʊəˈkʌstəmd tu ˈswɪmɪŋðæt ðeɪ kæn pɪk ʌp weɪts frʌm ðə flɔr ʌv ðə pul. ə geɪm ðæt ɪz ˈvɛri ˈpɑpjələr wɪððiz jʌŋˈswɪmərz ɪz ði ˈʌndərˌwɑtər ˈtraɪsɪkəl reɪs. ˈtraɪsɪkəlz ɑr laɪnd ʌp ɑn ðə flɔr ʌv ðə pul ˈsɛvən fit ˈʌndər ˈwɑtər. ðəˈʧɪldrən kəmˈpit əˈgɛnst iʧˈʌðər tu riʧ ði ˈʌðər ɛnd ʌv ðə pul. ˈmɛni ˈpɛdəl ðɛr ˈtraɪsɪkəlz, bʌt moʊst ʌv ðɛm prɪˈfɜr tu pʊʃɔr dræg ðɛm. sʌm ˈʧɪldrən kæn ˈkʌvər ðə hoʊl lɛŋkθ ʌv ðə pul wɪˈθaʊt ˈkʌmɪŋ ʌp fɔr brɛθ ˈivɪn wʌns. ˈwɛðər ðeɪ wɪl ˈɛvər bɪˈkʌm ˈfjuʧər oʊˈlɪmpɪk ˈʧæmpiənz, ˈoʊnli taɪm wɪl tɛl. ˈminˌwaɪl, ðeɪʃʊd ɪnˈkɜrəʤ ðoʊz əˈmʌŋ ʌs hu ˈkænɑt swɪm faɪv jɑrdz bɪˈfɔr ðeɪɑr ˈgæspɪŋ fɔr ɛr.
任务配置：L0+L4
知识笔记：
champion 冠军
experiment 实验
prove 证明
instruct 指导，教授；命令
reluctant 不情愿的
compete 竞争；比赛
encourage 鼓励；激励；支持
gasp 大口喘气
become expert at doing sth 擅长做某事
hold one's breath 憋住一口气；屏住呼吸
