练习材料：

it would be up and down, to and fro and from side to side. Instruments have been devised and can be so placed that all three elements can be recorded in different graphs.

When the instrument is situated at more than 700 miles from the earthquake centre, the graphic record shows three waves arriving one after the other at short intervals. The first records the arrival of longitudinal vibrations. The second marks the arrival of transverse vibrations which travel more slowly and arrive several minutes after the first. These two have travelled through the earth. It was from the study of these that so much was learnt about the interior of the earth. The third, or main wave, is the slowest and has travelled round the earth through the surface rocks.

/ɪt/ /wʊd/ /bi/ /ʌp/ /ænd/ /daʊn/, /tu/ /ænd/ /froʊ/ /ænd/ /frʌm/ /saɪd/ /tu/ /saɪd/. /'ɪnstrəmənts/ /hæv/ /bɪn/ /dɪˈvaɪzd/ /ænd/ /kæn/ /bi/ /soʊ/ /pleɪst/ /ðæt/ /ɔl/ /θri//ˈɛləmənts/ /kæn/ /bi/ /rəˈkɔrdəd/ /ɪn/ /ˈdɪfərənt/ /græfs/.

/wɛn/ /ði/ /ˈɪnstrəmənt/ /ɪz/ /ˈsɪʧuˌeɪtɪd/ /æt/ /mɔr/ /ðæn/ 700 /maɪlz/ /frʌm/ /ði/ /ˈɜrθˌkweɪk/ /ˈsɛntər/, /ðə/ /ˈgræfɪk/ /ˈrɛkərd/ /ʃoʊz/ /θri/ /weɪvz/ /əˈraɪvɪŋ/ /wʌn//ˈæftər/ /ði/ /ˈʌðər/ /æt/ /ʃɔrt/ /ˈɪntərvəlz/. /ðə/ /fɜrst/ /rəˈkɔrdz/ /ði/ /əˈraɪvəl/ /ʌv/ /ˌlɑnʤəˈtudənəl/ /vaɪˈbreɪʃənz/. /ðə/ /'sɛkənd/ /mɑrks/ /ði/ /əˈraɪvəl/ /ʌv//trænzˈvɜrs/ /vaɪˈbreɪʃənz/ /wɪʧ/ /ˈtrævəl/ /mɔr/ /ˈsloʊli/ /ænd/ /əˈraɪv/ /ˈsɛvrəl/ /ˈmɪnəts/ /ˈæftər/ /ðə/ /fɜrst/. /ðiz/ /tu/ /hæv/ /ˈtrævəld/ /θru/ /ði/ /ɜrθ/. /ɪt/ /wʌz//frʌm/ /ðə/ /ˈstʌdi/ /ʌv/ /ðiz/ /ðæt/ /soʊ/ /mʌʧ/ /wʌz/ /lɜrnt/ /əˈbaʊt/ /ði/ /ɪnˈtɪriər/ /ʌv/ /ði/ /ɜrθ/. /ðə/ /θɜrd/, /ɔr/ /meɪn/ /weɪv/, /ɪz/ /ðə/ /ˈsloʊəst/ /ænd/ /hæz/ /'trævəld//raʊnd/ /ði/ /ɜrθ/ /θru/ /ðə/ /ˈsɜrfəs/ /rɑks/.

任务配置：L0+L4

知识笔记：

1.词汇：

*up and down 上上下下

*to and fro 来来回回

*from side to side左左右右

*devise v.设计

*be recorded被测绘

*graph n.曲线图

*be situated at 被安装在

*more than 700 miles 700多英里

*from the earthquake centre距离震源

*the graphic曲线

*the first 首先

*the second 然后

*arrival n.到达

*longitudinal vibration纵波

*mark v.记录

*transverse vibration 横波

*several minitues 几分钟

*the interior of the earth 地球内部

*travel round the earth 围绕地球

练习感悟：

1.我还是太高估自己的记忆力了。今天又打脸了。今天倒不是t和d区分不开，是单词的动名词的读法弄错了，准确地来说，是重音弄错了。还好有@[00.449]Helen - 石家庄 - 软件 感觉她就像一个一直给我提示的老师。总能适当地给我揪出我的错误。非常感谢！(❁´ω`❁)

2.还是不能只看一眼，同时也不能把写单词及音标的事情延后，必须提前做好准备。以便在读的时候，更加准确无误地读出音标。

需要注意的点词尾的t和d这两个音标，以及单词动词名词的重音位置。多读几遍。

持续补充中...