宝春

各位同学们，为了督促帮助大家持续提升英语能力，培君老师们特意给大家准备了托福每日一包。每天覆盖听说读写内容，坚持完成两周以上，就能见到自己的英语能力不断上涨哟。

1. 听写包 答案：

Whistlers come from lightning-generated radio waves that leave earth’s atmosphere and travel into earth’s magnetosphere before bouncing back down.

Not all radio waves do this and the sound they make, well, we call them whistlers because they sound like slowly descending tones.

And no two whistlers are alike. To me, they’re the most intriguing.

Another interesting sound is the tweek.

Tweeks are the result of VLF waves that have travelled a long distance through the waveguides.

They produce a chirpy sound because the higher frequency parts of the wave reach the radio receiver before the lower frequency parts.

The entire wave is still considered very low frequency.

It’s just that some parts of the wave have lower frequencies than others, OK?

啸声信号来自闪电产生的无线电波，这种电波离开了地球的大气层，在重新反弹回来之前传播进了地球的磁气圈。

不是所有的无线电波都会这么做，而它们发出的声音，我们叫它们啸声信号是因为它们听起来像缓慢下降的调子。

任何两个啸声信号都是不同的。对我来说它们是最有趣的。

另一个有趣的声音是吱声。

吱声是VLF电波的产物，这些电波借助波导穿过了很长的距离。

它们发出了一种活泼的声音，因为这种电波较高频次的部分比低频次的部分更早到达无线电接收器。

但这整段电波仍被认为是非常低频次的电波。

只是电波中的某些部分比其他的拥有更低的频次。知道了吗？

2.阅读包答案：

社会科学是知识探索的一个分支，它力图像自然科学家研究自然现象那样，用理性的、有序的、系统的和冷静的方式去研究人类及其行为。

3.写作包答案：

中译英1：

All of life is an act of letting go, but what hurts the most is not taking a moment to say goodbye.

中译英2：

Since the Sui Dynasty,the feudal government started to select officials from the qualified candidates in the imperial examinations.There were two kinds of people taking the imperial examination.One was comprised of students chosen by academies, who were called shengtu; the other kind,called xianggong, was made up of those who had passed the examinations held by counties.The imperial examination in the Tang Dynasty was usually held by the Ministry of Rites.Those who passed the examination would be re-examined by the Ministry of Personnel and be conferred with relevant official positions according to their examination results.The imperial examination system was used throughout many dynasties until China's last imperial dynasty,the Qing Dynasty.However, during the Ming and Qing Dynasties,the imperial examination system became a strict and rigid institution which stopped China from adopting modern and scientific methods.