练习材料：
NCE--第四册
Lesson 40-1 Waves
Waves are the children of the struggle between ocean and atmosphere, the ongoing signatures of infinity. Rays from the sun excite and energize the atmosphere of the earth, awakening it to flow, to movement, to rhythm, to life. The wind then speaks the message of the sun to the sea and the sea transmits it on through waves -- an ancient, exquisite, powerful message. These ocean waves are among the earth's most complicated natural phenomena. The basic features include a crest (the highest point of the wave), a trough (the lowest point), a height (the vertical distance from the trough to the crest), a wave length (the horizontal distance between two wave crests), and a period (which is the time it takes a wave crest to travel one wave length). Although an ocean wave gives the impression of a wall of water moving in your direction, in actuality waves move through the water leaving the water about where it was.
[weɪvz] [ɑː] [ðə] [ˈʧɪldrən] [ɒv] [ðə] [ˈstrʌgl] [bɪˈtwiːn] [ˈəʊʃən] [ænd] [ˈætməsfɪə], [ði] [ˈɒŋˌgəʊɪŋ] [ˈsɪgnɪʧəz] [ɒv] [ɪnˈfɪnɪti]. [reɪz] [frɒm] [ðə] [sʌn] [ɪkˈsaɪt] [ænd] [ˈɛnəʤaɪz] [ði] [ˈætməsfɪər] [ɒv] [ði] [ɜːθ], [əˈweɪknɪŋ] [ɪt] [tuː] [fləʊ], [tuː] [ˈmuːvmənt], [tuː] [ˈrɪðəm], [tuː] [laɪf]. [ðə] [wɪnd] [ðɛn] [spiːks] [ðə] [ˈmɛsɪʤ] [ɒv] [ðə] [sʌn] [tuː] [ðə] [siː] [ænd] [ðə] [siː] [trænzˈmɪts] [ɪt] [ɒn] [θruː] [weɪvz] -- [ən] [ˈeɪnʃ(ə)nt], [ˈɛkskwɪzɪt], [ˈpaʊəfʊl] [ˈmɛsɪʤ]. [ðiːz] [ˈəʊʃən] [weɪvz] [ɑːr] [əˈmʌŋ] [ði] [ɜːθs] [məʊst] [ˈkɒmplɪkeɪtɪd] [ˈnæʧrəl] [fɪˈnɒmɪnə]. [ðə] [ˈbeɪsɪk] [ˈfiːʧəz] [ɪnˈkluːd] [ə] [krɛst] ([ðə] [ˈhaɪɪst] [pɔɪnt] [ɒv] [ðə] [weɪv]), [ə] [trɒf] ([ðə] [ˈləʊɪst] [pɔɪnt]), [ə] [haɪt] ([ðə] [ˈvɜːtɪkəl] [ˈdɪstəns] [frɒm] [ðə] [trɒf] [tuː] [ðə] [krɛst]), [ə] [weɪv] [lɛŋθ] ([ðə] [ˌhɒrɪˈzɒntl] [ˈdɪstəns] [bɪˈtwiːn] [tuː] [weɪv] [krɛsts]), [ænd] [ə] [ˈpɪərɪəd] ([wɪʧ] [ɪz] [ðə] [taɪm] [ɪt] [teɪks] [ə] [weɪv] [krɛst] [tuː] [ˈtrævl] [wʌn] [weɪv] [lɛŋθ]). [ɔːlˈðəʊ] [ən] [ˈəʊʃən] [weɪv] [gɪvz] [ði] [ɪmˈprɛʃən] [ɒv] [ə] [wɔːl] [ɒv] [ˈwɔːtə] [ˈmuːvɪŋ] [ɪn] [jɔː] [dɪˈrɛkʃən], [ɪn] [ˌækʧʊˈælɪti] [weɪvz] [muːv] [θruː] [ðə] [ˈwɔːtə] [ˈliːvɪŋ] [ðə] [ˈwɔːtər] [əˈbaʊt] [weər] [ɪt] [wɒz].
任务配置：
L0+L4
知识笔记 ：
