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：

Over time these sub-populations in all those different habitats...well, they developed very different physical traits.

They adapted to survive in their particular ecological niche, their...their position within a particular ecosystem.

We call this type of species diversification within a species adaptive radiation.

And what adaptive radiation is is: an evolutionary process by which a parent species rapidly undergoes changes resulting in various new species in order to fill multiple ecological niches.

So in the case of the Notothenioids, that single species started colonizing empty habitats to such an extent that it evolved into a broad range of new species, the 90 or so Notothenioid species that we have today.

So let me switch to adaptive radiation with regard to another species that's also been very successful.

What is the lecture mainly about?

Why does the professor mention that coral reefs support more than 4000 species of fish?

What the characteristic of Notothenioids helps them survive in sub-freezing temperatures?

Why did the anti-freeze protein initially give no special advantage to the earlier's Notothenioids?

According to the professor, what factors led to the rapid distribution of notothenioids throughout the Southern Ocean?

According to the professor, what happen to Notothenioids that migrate into different areas of the Southern Ocean?

久而久之，这些在不同栖息地的亚种……它们发展出了差异很大的生理特性。

它们适应了在自己特定的生态位生存，即它们……它们在某个特定生态系统中的位置。

我们称这种种类物种多样化为“适应性辐射”。

适应性辐射是什么呢：它是一种进化过程，母种迅速经历了许多改变，导致了新物种出现，来填补更多的生态位。

所以对南极鱼而言，那单单一种鱼开始在空旷的栖息地里殖民，达到了这样一种程度——进化出形形色色的新物种，也就是我们今天知道的90多种南极鱼。

让我（把话题）切换到另一个非常成功的物种，它也有适应性辐射。

这节课主要讲了什么？

为什么教授要提及珊瑚礁养活了超过4000种鱼？

南极鱼的什么特点帮助它们在低于冰点的温度里生存下来？

为什么抗冻蛋白最初没有给早期的南极鱼提供优势？

根据教授所言，是什么因素造成南极鱼迅速遍布南部海域？

根据教授所言，南极鱼中，迁徙到南部海域其它地方的的鱼类都经历了什么？

2.阅读包答案：

这位美国间谍头子对情报非常痴迷，他在“二战”中创建了战略服务处，后来又为中央情报局的成立奠定了基础。

3.写作包答案：

The opening of a door is a mystic act:It has some flavor of the unknown,some sense of moving into a new moment,and a new pattern of the human rigmarole.It includes the highest glimpses of mortal gladness,reunions,reconciliations,the bliss of lovers long parted.Even in sadness,the opening of a door may brign relief-it changes and redistributes human forces.But the closing of a door is far more terrible.It is a declaration of finality.Every closed door brings somethins to an end.And there are degrees of sadness in the closing of a door.A door slammed is a confession of weakness.A door gently shut is often the most tragic gesture in life.Everyone knows the extreme anguish that comes just after the closing of a door,when the loved one is still near,within sound of voice,and yet already far away.