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：

At that point we call it a memory T-cell because it’s learned to recognize a protein marker that identifies this particular kind of bacterium.

But before it’s learned to recognize any particular protein from outside the body, we call it naive. Okay?
Yeah, I get it.
There is a lot of biochemistry involved that we’ll get into in the next lecture.
But your question reminds me about a study that some of my colleagues are doing, it relates to caloric restriction.
Caloric? Like calories in the food we eat.
Exactly! We are talking about the sugars, carbohydrates, fats that our bodies burn to get energy which we measure in calories.
Okay, let’s back up a little. Back in the 1930s, a nutritionist at Cornell University put mice on a severely restricted diet.
He gave each mouse in one group 30% less food, or more precisely, 30% fewer calories than the mice in the other group which ate a normal amount.
And the result, the underfed mice lived much longer than the normally fed ones.
在那个阶段，我们称它为记忆性T细胞，因为它学会了辨认代表着这种细菌的蛋白标志物。
但是在它学会辨认任何来自身体之外的具体蛋白质之前，我们称它们为幼稚型，懂了吗？
嗯，我懂了。
这其中涉及了很多生物化学知识，我们下堂课会讲到的。
但是你的问题让我想起了我的一些同事正在做的一项研究，它和卡路里限制有关。
卡路里的？就像我们吃的食物中的卡路里一样？
没错！我们讲的是我们身体燃烧以获取能量的糖分、碳水化合物、脂肪，这些我们都是用卡路里来计算的。
好了，我们往回讲一点。在过去二十世纪三十年代的时候，一位Cornell大学的营养学家给老鼠制定了一个严格限制的食谱。
他少给了一组里的每只老鼠30%的食物量，或者更确切地说，比另一组正常食量的老鼠少30%的卡路里。
结果是，食物不足的老鼠比正常喂养的老鼠活得久得多。

2.阅读包答案：

从图画中可以很容易看出，除了络我们提高众多便利以外，互联网也使人们彼此之间变得疏远。

3.写作包答案：

The National Day Golden Week is one of the most important and the longest holidays in China.It's a good opportunity to promote domestic demand for tourism market.Actually,tourism can promote domestic demand and stimulate consumption in the rapidest way.As to the tourism revenue, the earning of tourism during the national holiday is on the rise every year.For the public,they have more and more ways to have fun.The migrant workers can go back home to visit relatives and reunite with family members;office workers can take advantage of the holiday to travel with family or go to party with friends,and students can have a good sleep for a few days.