老托福听力

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英语很不好，听力就更差了，之前基本没听过任何材料，TPO听不懂。于是根据口碑传播，下载了老托福PARTC分类的那个文件。（樊甦老师的那版）但问题来了，那个文件附带了听力的英文文本。但是我看那个英文文本也不能完全准确的理解。只能看懂个大意。想问问。这个材料有中文翻译吗、附带的听力材料中有些地方不能很好理解.
谢谢，但我单词一直按照词以类记在背，背了很多单词，单词问题不大。具体问题如下
听力材料：甲壳虫
This morning I want to tell you about a recent scientific discovery dealing with the relationship between plants and animals.
This is about a desert shrub whose leaves can shoot up a stream of poisonous resin a distance of six feet. Do you think it would
be safe from all attacks by insects? But a recent study has found one insect, a beetle that can chew its way past the plant’s
defense system by cutting the main vein that delivers the poison to the leaves. This vein cutting is just one method the beetles
used to prepare a safe meal. Another is by cutting a path all the way across the leave to hold the flow of chemicals. Then they simply eat between the veins of poison. In the past, scientists who studied insect adaptation to plant defenses have focused on
chemical responses. That is, how the insects can neutralize or alter the poisonous substances plants produce. What’s unique
about this chewing strategy is that the beetle is actually exhibiting a behavioral response to the plant’s defenses rather than the more common chemical response. It is only after a beetle’s survived several encounters with the plant’s resin that it learns how to avoid the poison: by chewing through the resin transporting veins on the next leaf it eats. And thus gives itself a safe meal. However, it can take a beetle an hour and a half of careful vein cutting to prepare a small leaf that takes it only a few minutes to eat. So, though the method is effective it’s not very efficient全部.自己翻译了一遍。大概意思知道。但模糊的也不少。
其中主要模糊的部分有
1.(This vein cutting is just one method the beetles used to prepare a safe meal. Another is by cutting a path all the way across the leave to hold the flow of chemicals.这里讲了2种方式，第一种方式这里用的used to译为过去常常，但感觉翻译出来很蹩脚。结合前面几句译为：最近研发现。甲壳虫可以经过其防御系统通过把毒素传递到叶子里面，砍断主叶脉。砍断叶脉仅仅是一种方法，过去常常用来准备安全的食物。另外一种方式说的是切断什么？这里的PATH应该翻译成什么?后面什么保持化学元素的流动?

2.
What’s unique about this chewing strategy is that the beetle is actually exhibiting a behavioral response to the plant’s defenses rather than
the more common chemical response前面几句提到在过去，科学家研究昆虫对于植物防御的适应性聚焦在化学反应。这就是昆虫能够中和或者改变植物排除的有毒物质。紧接着(what’s unqiue…….rather than……chemical response) 说什么行为反映而不是化学反映的。但具体也不是很懂。

3.
It is only after a beetle’s survived several encounters with the plant’s resin that it
learns how to avoid the poison: by chewing through the resin transporting veins on the next leaf it eats. And thus gives itself a
safe meal. However, it can take a beetle an hour and a half of careful vein cutting to prepare a small leaf that takes it only a
few minutes to eat. So, though the method is effective it’s not very efficient 个人认为翻译为，经过长期战斗经验学会了如何避免毒素，（by chewing through the resin transporting veins on the next leaf it eats.）这句话不懂，通过咀嚼什么？

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顶起来，继续问

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这里没人帮忙解答问题吗？

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junlanyue

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