新概念英语第四册喜马拉雅播放mp3最难课文笔记教材习题答案

新概念英语第四册喜马拉雅播放mp3最难课文笔记教材习题答案

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Lesson 7 Bats
7-11. It has been found  that certain bats emit squeaks  and by receiving the
echoes, they can locate and steer clear of obstacles —or locate flying
insects on which they feed.
【译文】人们已发现，某些蝙蝠能发出尖叫并通过回声确定并躲开障碍物，或找到
它们赖以为生的昆虫。
【讲解】obstacle作locate和steer clear of的宾语。obstacles后的破折号引出被
强调的词语。they feed指bats feed。
【单词和短语】
steer clear (of someone/something)：绕开，避开（to avoid sb. or sth. unpleasant
or difficult ），例如：
She steered clear of being associated with such people.
她避免与这种人交往。
feed on：以⋯⋯为食物，吃，食（ if an animal feeds on a particular food, it
usually eats that food ），例如：
Sheep feed mostly on grass.  羊主要以草食。
Owls feed on mice and other small animals.
猫头鹰以老鼠和其他小动物为食。
7-12. This echo-location  in bats is often compared with radar, the principle
of which is similar.
【译文】蝙蝠这种回声定位常与雷达相比较，二者原理相似。
【讲解】the principle  of which is similar 是非限制性定语从句。which代表radar。
Lesson 8 Trading standards

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