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：

Listen to part of a lecture in a material science class.

OK.Last time we finished going over some of the fundamental concepts of nanotechnology,
the multi-disciplinary science of manipulating or controlling extremely small units of matter on the scale of molecules or even atoms.
So, I want to talk about how nanotechnology is being used today.
And just to give you an idea, we’ll look at one particular application.
A team of material scientists in Massachusetts has been working on a new ultra-thin coating,
a nano coating that might be applied to objects like bathroom mirrors, car windows, and eye glasses to prevent fogging.
And the coating has the potential to be a permanent solution, unlike the kinds of anti-fogging spray-on liquids that are on the market today.
Now, fogging often occurs when a cold surface comes into contact with warm moist air, such as when a glass shower door or mirror fogs up during a warm shower.
Now, what’s actually happening is, what the fog is, is thousands of tiny spherical water droplets condensing on the surface of the glass.
Light hits the water droplets and is scattered in random directions, causing the fogging effect.
请听材料科学课上的部分内容。
上次我们讲完了关于纳米技术的一些基本概念，
这是在分子或者甚至原子规模上操纵极小单位的物质的多学科科学。
所以我想讲一讲如今我们是如何应用纳米技术的。
为了让你们有个大致了解，我们来看一个具体的应用案例。
一组Massachusetts的材料科学家一直在研究一种新的超薄涂层，
一种也许能涂在像浴室镜子、车窗和眼镜上防止起雾的纳米涂层。
这种涂层有永久性解决问题的潜力，不像现在市场上的那种防起雾的喷雾型液体。
当一个冰冷的表面接触到了温暖的湿气时就会起雾，比如一个淋浴室的玻璃门或镜子会在洗热水澡时起雾。
真正发生的是，这个雾是好几千个微小的球形水滴凝结在玻璃表面。
光线照到这些水滴上并且发散到了任意方向，由此导致了起雾效应。

2.阅读包答案：

因此，人类学中的“文化”概念就像数学中的 “集”一样，是一个抽象概念，它使大量的具体研究和认识成为可能。

3.写作包答案：

After Emperor Qin Shi Huang united the separate states, he restored, linked up and extended the city walls built by the former states into huge military defensive works which started from the Liaodong Peninsula in the east and ended at Lintao in the west. This is the world-famous Great Wall. It is one of the important wonders of the world, consisting of hundreds of passes，fortresses, towers and walls. Beacon towers are built at certain intervals to give the alarm if enemies approach. The parts of the Great Wall situated at Badaling, Mutianyu and Simatai in Beijing were all constructed during the Ming Dynasty. Nowadays, the Great Wall attracts a great many tourists from home and abroad each year. It is an artistically extraordinary cultural relic and historic site as well as the crystalisation of Chinese people's great strength and wisdom.