练习材料：
NCE--第四册
Lesson 7-1 Bats
Not all sounds made by animals serve as language, and we have only to turn to that extraordinary discovery of echo-location in bats to see a case in which the voice plays a strictly utilitarian role.
To get a full appreciation of what this means we must turn first to some recent human inventions. Everyone knows that if he shouts in the vicinity of a wall or a mountainside, an echo will come back. The further off this solid obstruction, the longer time will elapse for the return of the echo. A sound made by tapping on the hull of a ship will be reflected from the sea bottom, and by measuring the time interval between the taps and the receipt of the echoes, the depth of the sea at that point can be calculated. So was born the echo-sounding apparatus, now in general use in ships.
[nɒt] [ɔːl] [saʊndz] [meɪd] [baɪ] [ˈænɪməlz] [sɜːv] [æz] [ˈlæŋgwɪʤ], [ænd] [wiː] [hæv] [ˈəʊnli] [tuː] [tɜːn] [tuː] [ðæt] [ɪksˈtrɔːdnri] [dɪsˈkʌvəri] [ɒv] [ˈɛkəʊ]-[ləʊˈkeɪʃən] [ɪn] [bæts] [tuː] [siː] [ə] [keɪs] [ɪn] [wɪʧ] [ðə] [vɔɪs] [pleɪz] [ə] [ˈstrɪktli] [ˌjuːtɪlɪˈteərɪən] [rəʊl].
[tuː] [gɛt] [ə] [fʊl] [əˌpriːʃɪˈeɪʃ(ə)n] [ɒv] [wɒt] [ðɪs] [miːnz] [wiː] [mʌst] [tɜːn] [fɜːst] [tuː] [sʌm] [ˈriːsnt] [ˈhjuːmən] [ɪnˈvɛnʃənz]. [ˈɛvrɪwʌn] [nəʊz] [ðæt] [ɪf] [hiː] [ʃaʊts] [ɪn] [ðə] [vɪˈsɪnɪti] [ɒv] [ə] [wɔːl] [ɔːr] [ə] [ˈmaʊntɪnsaɪd], [ən] [ˈɛkəʊ] [wɪl] [kʌm] [bæk]. [ðə] [ˈfɜːðər] [ɒf] [ðɪs] [ˈsɒlɪd] [əbˈstrʌkʃən], [ðə] [ˈlɒŋgə] [taɪm] [wɪl] [ɪˈlæps] [fɔː] [ðə] [rɪˈtɜːn] [ɒv] [ði] [ˈɛkəʊ]. [ə] [saʊnd] [meɪd] [baɪ] [ˈtæpɪŋ] [ɒn] [ðə] [hʌl] [ɒv] [ə] [ʃɪp] [wɪl] [biː] [rɪˈflɛktɪd] [frɒm] [ðə] [siː] [ˈbɒtəm], [ænd] [baɪ] [ˈmɛʒərɪŋ] [ðə] [taɪm] [ˈɪntəvəl] [bɪˈtwiːn] [ðə] [tæps] [ænd] [ðə] [rɪˈsiːt] [ɒv] [ði] [ˈɛkəʊz], [ðə] [dɛpθ] [ɒv] [ðə] [siː] [æt] [ðæt] [pɔɪnt] [kæn] [biː] [ˈkælkjʊleɪtɪd]. [səʊ] [wɒz] [bɔːn] [ði] [ˈɛkəʊ]-[ˈsaʊndɪŋ] [ˌæpəˈreɪtəs], [naʊ] [ɪn] [ˈʤɛnərəl] [juːz] [ɪn] [ʃɪps].
任务配置：
L0+L4
知识笔记 ：
练习感悟：
今天是新课文前半段，文章不长，句子很复杂。长句的理解真是要命啊，要用很长时间对照解析，感觉语法的部分是最难的。还有弄明白一些词的词性对朗读也很重要。
