2020托福听力听不懂3类主要原因分析
托福听力中考生经常遇到的问题之一是听不懂。而为了应对这个问题，考生可能会从很多角度来寻找解决方法。其实听不懂的情况也需要分成很多种，不同的情况需要各自针对性的改善方法。下面小编就和大家分享托福听力听不懂3类主要原因分析，欢迎阅读!
托福听力听不懂3类主要原因分析 了解问题所在才能对症下药
托福听力听不懂3大类原因分析
都说托福听力听不懂只要多练就行了，但这种说法未免太过简单粗暴，而导致考生听不懂听力素材在说什么的原因其实有很多，发生在大部分考生身上的听不懂原因主要可以分为以下三种：
1. 没听清听力素材的发音
这种听不懂的情况是最基础的问题，也就是考生在听音辨音的能力上存在一定问题，听不清楚或是无法准确分辨出一个单词的具体发音。导致这种情况的原因主要是因为考生自己的发音就不太标准，缺乏足够的发声练习，也没有做过发音校正，自己对词汇发音的记忆就有错误，听到正确发音反而听不出来也就在所难免了。
2. 听不懂说的是什么词汇
第二种听不懂的情况是考生虽然能够听清发音，但却辨识不出来说的是哪个词汇。有些同学对词汇的记忆存在一定的盲区。在背托福词汇的时候过多的把注意力放在了词汇的拼写含义和书面使用等方面，而忽略了词汇的发音，只是记住了一个大概，这就会造成大家能够看懂词汇甚至熟练使用，在听力中却分辨不出来到底是哪个词汇的问题，这种不清楚词汇发音的情况也就是俗称的哑巴英语，在中国考生当中较为普遍，也是导致许多同学听不懂托福听力在讲什么的主要原因之一。
3. 能听出词汇但连起来就听不懂了
最后一种情况则是考生能够听懂词汇，但对于较长的句子则听不太懂意思。这种情况从句子的层面来看，说明考生缺乏对英语句式的掌握和理解，或者在面对完整句子的听力时反应不过来，能听清每个单词，但是连在一起就不知道是什么意思了。
当然，小编认为托福听力会听不懂，很多时候并不是因为上述3个原因中的1个单独作祟，而是2个甚至3个原因同时存在才造成了困扰。所以，考生要做的就是结合自身的情况，对导致自己托福听力听不懂的原因做详细分析理解，并采取具有更强针对性的方式来进行训练以从根本上解决问题。
托福听力听不懂问题如何解决?
其实想要解决托福听力听不懂的问题，考生只需要做好听抄练习就能基本达成目标。所谓听抄练习，就是通过边放音频边做听写的方式来进行训练。这种练习的目的在于提升考生对听力素材的精确理解能力，帮助大家更准确地听懂素材里的每一句话。想要达到这个目的，考生做听抄练习就不能只是简单的听写记录，需要按照严格的练习步骤来进行训练。具体步骤是：
1. 首先，考生需要先完整听一遍素材的全文从而了解文章的大意;
2. 然后再一次听全文，这次需要对文章里涉及到主旨观点的具体信息和话题的相关关键词进行记录;
3. 第三个步骤才是逐个句字的听写练习。大家可以结合自己的实际水平在记录过程中采用听几句暂停一下的方式，但需要按照先记下句子主干再返回重听补充细节的做法来还原整个句子，记住一定要以完整句子为基本练习单位进行听写;
4. 最后一步是在听写完所有内容后再参照原文做对比总结，从中发现自己的问题，特别是词汇方面没听出来或者语法上存在缺陷的地方，及时补强。
通过这个完整的步骤来进行听抄练习，上文提到的这些问题就都能比较好的解决了。
2020托福听力练习：资源回收是否真的有效
At Brooklyn's recycling depot, discarded metal and plastic gets bulldozed into a large mound.
The stuff is then scooped onto the first of a series of rising conveyor belts, from which the trash is sorted through means both mechanical and manual.
All that effort produces a variety of salable products, from metals to paper fibers.
But is it worth it?
In the case of an aluminum can the answer is an unqualified yes.
Such a can can be recycled endlessly with no loss of quality.
And recycling a can uses less than five percent of the energy that it takes to refine bauxite ore into fresh aluminum.
Recycling is worth it when it comes to all metals, though we're better at recycling aluminum than say neodymium.
In principle it could work for plastic, too.
But because plastic is made from petrochemicals, low oil prices can make it cheaper to just dump old plastic and manufacture new.
And plastics degrade as they're recycled, as does paper.
That said, a simple cost-benefit analysis does not correctly measure the environmental costs of dumping plastics or cutting down more trees for paper products.
The EPA suggests that recycling in the U.S.reduces the same amount of greenhouse gas pollution as taking more than 38 million cars off the road.
The sound of recycling may prove music to the ears of future generations.
2020托福听力练习：新型智能键盘可识别主人
Keyboards don't exactly spring to mind when you think of high-tech innovations, especially now that we have voice and even gesture controls for our gadgets.
Still, a new device out of the Georgia Institute of Technology is taking typing in a smart direction.
The Georgia Tech researchers have developed an intelligent keyboard that captures information about the force and length of keystrokes.
They say these patterns are unique to different typists and could lead to a new type of biometric security, locking out anyone who doesn't type like you do.
The keyboard can also power itself using something called contact electrification.
It generates current when your fingertips touch the keys, which are coated with an electrode material.
So we're talking about a wireless keypad that never needs batteries.
The researchers published a paper about their intelligent keyboard in the journal ACS Nano.
Maybe the best feature of the keyboard is that it's basically made from layers of plastic and has no mechanical keys.
That means you could drop crumbs or even spill coffee on it without any damage—forget voice recognition, now you're talking!
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