今天前程百利小编为大家分享的是托福听力TPO7之lecture2学习笔记。大家可以参考一下这些备考经验，看看自己应该如何攻克托福听力。
一、难词注解
Infrasound 次声;亚声
acoustical spectrum 声频谱
ultrasound 超声;超音波
echolocation 回波定位;回声测距
navigation and orientation 导航和定位
predator 捕食者;食肉者
二、长难句分析
Now, we have tended to underestimate just how sophisticated the abilities of animals that use ultrasound are. 现在我们就知道动物在运用超声波的时候的非凡经验了。
难词释义：
Sophisticated adj.复杂的; 精致的; 富有经验的; 深奥微妙的;v.使变得世故; 使迷惑; 篡改(sophisticate的过去分词形式);
难句类型：
倒装句 how sophisticated t+其他，animals that+定语从句
三、考题对应考点
12主旨题，过程原则。Lecture 的主要内容是讲述蝙蝠如何利用超声波进行定位、避险、捕食等行为。答案应为 B。Lecture 并没有讲诉动物发出超声波的机理，所以 A 选项错误;讲座中有提到雷达和 echolocation 的比较，但并不是讲座主线，所以 C 选项错误;讲座中有提及有些蝙蝠可以靠视力定位，而大多数蝙蝠只能靠超声波，但这部分内容不算讲座的主线，所以D 选项错误。
13.You know, I don’t think I need to draw any echoes, your reading assignment for the next class; it has a diagram that shows this very clearly.强调原则，You know后面的内容要注意。说明相关图表在学生的教材中已经出现，所以答案为 D.
14. the moth can detect the bat’s presence. So, it has time to escape to safety, or else they can just remain motionless.因果原则，这句话讲出了 moth 发觉到蝙蝠的存在后的两种可能反映，一是逃走，二是保持静止。分别对应A,C选项。
15. we thought for a long time that the bat stops their evaluation as simply that is a tree. Yet, it turns out that bats or at least this particular species, cannot only tell that is a tree, but can also distinguish between, say, a pine tree, and a deciduous tree, like a maple or oak tree, just by their leaves.转折原则，but 后面的内容是重点，本来以为蝙蝠只能知道前面有棵树而不能分析得到进一步的信息，但最近的研究显示蝙蝠可以通过树叶整体的形状分别出不同种类的树。所以选择B 选项。
16.You are on the right track---it is actually the echo of all the leaves as whole that matters. Now, think, a pine tree with all those little densely packed needles. Those produce a large number of faint reflections in what’s... what’s called a ... a smooth echo. 强调原则，Now,后面的内容是重点，因为 it has many small, densely packed needles，所以a pine tree produce a "smooth" echo，也就是C选项。
17.Carol: Well, bats, since they are all blind, bats have to use sound for, you know, to keep from flying into things. Carol 曾经提到过蝙蝠都是盲的，而教授在这里想要纠正她这一说法。所以选择 B选项。
好了，以上就是前程百利小编为大家整理的托福听力TPO7之lecture2学习笔记。相信大家一定有所收获，希望能在备考的路上助大家一臂之力。最后，小编预祝大家在托福考试中取得好成绩。
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