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：

So later on in life, there are fewer and fewer of these naive T-cells left to deal with any new disease, causing organisms that might attack,

which means less immunity, and the animal or person is more likely to get sick.
But caloric restriction, it kind of shocks the system,
and one result is, well, those monkeys on the calorie-restricted diet had lots more naive T-cells left than you’d expect in monkeys that old.
The expected drop in naive T-cells, apparently the shock of getting 30% fewer calories really slows that down.
And after many years, with so many more naive T-cells still in reserve,
these monkeys are a lot better at fighting off new infections than normally fed monkeys of the same advanced age.
And that’s why they live longer?
Well, it’s got be one reason. This is all pretty complex though with lots of details yet to be worked out.
But are results the same for humans?
Hard to say. A good study would take decades.And it’s not easy finding people who’d want to take part, would you?
And eat 30% less. That would be tough.
You bet it would.
所以在生命的晚年阶段，剩下的对付新疾病的这些幼稚型T细胞越来越少，会产生可能会引发疾病的微生物，
这就意味着免疫力下降，动物或人类生病的可能性就更大。
但是卡路里限制，它有点惊吓住了整个系统，
一个结果就是，那些使用了卡路里限制食谱的猴子会有更多幼稚型T细胞剩下，这个数量远比我们在年纪那么大的猴子身上预期看到的要多。
预计的幼稚型T细胞的减少，显然减少30%卡路里受到的惊吓真的减缓了这个过程。
很多年后，仍有着那么多幼稚型T细胞，
这些猴子在对抗新感染方面比同样年纪的普通喂养的猴子表现要好得多。
这就是为什么它们活得更久吗？
这一定是其中一个原因。不过这一切都非常复杂，还有很多细节有待查明。
但是这些结果对人类来说也是一样的吗？
很难说。认真研究要花十几年时间。而且找到愿意参与实验的人不太容易，你会愿意参加吗？
要少吃30%？那太难了。
可不是嘛。

2.阅读包答案：

我对此实感抱歉，希望我的疏忽没有给您带来不便。

3.写作包答案：

Global warming, a natural phenomenon,has been a heated topic in recent years. Global warming will redistribute global rainfall, make glacier and permafrost melt and sea level rise, which not only does harm to the balance of natural ecosystem, but also threats human's food supply and living environment. It's interesting that global warming is bad for some places but good for other regions. For example, because temperature in cold areas in Antarctic and Arctic goes up, glacier will melt, thus making the habitat of animals decrease. While in the northeast of China, becoming warm means being able to plant grains of winter, thus raising agricultural revenue