练习材料：
NCE--第四册
Lesson 30-3 Exploring the sea-floor
From the shore line, out to a distance which may be anywhere from a few miles to a few hundred miles, runs the gentle slope of the continental shelf, geologically part of the continents. The real dividing line between continents and oceans occurs at the foot a steeper slope.
This continental slope usually starts at a place somewhere near the 100-fathom mark and in the course of a few hundred miles reaches the true ocean floor at 2,500-3,500 fathoms. The slope averages about 1 in 30. but contains steep, probably vertical, cliffs, and gentle sediment-covered terraces, and near its lower reaches there is a long tailing-off which is almost certainly the result of material transported out to deep water after being eroded from the continental masses.
[frɒm] [ðə] [ʃɔː] [laɪn], [aʊt] [tuː] [ə] [ˈdɪstəns] [wɪʧ] [meɪ] [biː] [ˈɛnɪweə] [frɒm] [ə] [fjuː] [maɪlz] [tuː] [ə] [fjuː] [ˈhʌndrəd] [maɪlz], [rʌnz] [ðə] [ˈʤɛntl] [sləʊp] [ɒv] [ðə] [ˌkɒntɪˈnɛntl] [ʃɛlf], [ʤɪəˈlɒʤɪkəli] [pɑːt] [ɒv] [ðə] [ˈkɒntɪnənts]. [ðə] [rɪəl] [dɪˈvaɪdɪŋ] [laɪn] [bɪˈtwiːn] [ˈkɒntɪnənts] [ænd] [ˈəʊʃənz] [əˈkɜːz] [æt] [ðə] [fʊt] [ə] [ˈstiːpə] [sləʊp].
[ðɪs] [ˌkɒntɪˈnɛntl] [sləʊp] [ˈjuːʒʊəli] [stɑːts] [æt] [ə] [pleɪs] [ˈsʌmweə] [nɪə] [ðiː] 100-[ˈfæðəm] [mɑːk] [ænd] [ɪn] [ðə] [kɔːs] [ɒv] [ə] [fjuː] [ˈhʌndrəd] [maɪlz] [ˈriːʧɪz] [ðə] [truː] [ˈəʊʃən] [flɔːr] [æt] 2,500-3,500 [ˈfæðəmz]. [ðə] [sləʊp] [ˈævərɪʤɪz] [əˈbaʊt] 1 [ɪn] 30. [bʌt] [kənˈteɪnz] [stiːp], [ˈprɒbəbli] [ˈvɜːtɪkəl], [klɪfs], [ænd] [ˈʤɛntl] [ˈsɛdɪmənt]-[ˈkʌvəd] [ˈtɛrəsɪz], [ænd] [nɪər] [ɪts] [ˈləʊə] [ˈriːʧɪz] [ðeər] [ɪz] [ə] [lɒŋ] [ˈteɪlɪŋ]-[ɒf] [wɪʧ] [ɪz] [ˈɔːlməʊst] [ˈsɜːtnli] [ðə] [rɪˈzʌlt] [ɒv] [məˈtɪərɪəl] [trænsˈpɔːtɪd] [aʊt] [tuː] [diːp] [ˈwɔːtər] [ˈɑːftə] [ˈbiːɪŋ] [ɪˈrəʊdɪd] [frɒm] [ðə] [ˌkɒntɪˈnɛntl] [ˈmæsɪz].
任务配置：
L0+L4
知识笔记 ：
练习感悟：
今天是课文最后一部分，要注意熟悉生词。单词中，run作动词，可表示“（向某一方向）伸展，延展”；reach作名词，可表示“地带，大片地区，大片水域”。
今天晕晕的，读得不好，要早点睡。
