句子反复磨耳朵（中级） 21-30

听前提示一、三遍英文，一遍中文，再一遍英文。二、从听懂的词入手，理解句子含义。三、根据中英文意思，听不懂的多听几遍。词汇提示1.stands for 代表2.a bunch of 一群3.hoodlums 流氓4.If only 如果...多好5.pigeons 鸽子6.magnetic field 磁场7.as it is 事实是原文21.TV is harmful in that it keeps your mind in a passive state.电视有害，因为它使你的思想处于被动状态。22.This jet travels about three times as fast as the speed of sound.这架喷气机的速度大约是声速的三倍。23.In this secret code，each number stands for a letter of the alphabet.在这个密文中，每个数字代表字母表中的一个字母。24.The young man saved the girls from a bunch of hoodlums.那个年轻人从一群流氓手中救了那个女孩。25.I can't think of the right words with which to express my thanks.我想不出合适的词来表达我的感谢。26.There's no room to study here. If only I had a room of my own！这里没有学习的空间。要是我有自己的房间就好了！27.Pigeons can find their way home with the help of the earth's magnetic field.鸽子可以在地球磁场的帮助下找到回家的路。28.I wish I can go with you，but as it is，I can't.我希望能和你一起去，但事实上我不能。29.Some day you will come to realize the important of saving.总有一天你会意识到储蓄的重要性。30.The explanation below was achieved by comparing and contrasting a variety of different theories.下面的解释是通过比较和对比各种不同理论得出的。

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