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教育学习   

2023-03-28   Video
Analyzing Patterns in the Savanna Landscape

Keywords:

SPEAKER: From zebra stripes, to cracked mud, to honeycombs, patterns abound in nature. Are these patterns just pleasing to the eye or do they reveal something about biological processes? ...

演讲者:从斑马条纹,裂泥,蜂窝,自然界中充满了图案。这些模式只是赏心悦目或者他们透露了什么吗关于生物过程?对于生态学家来说,了解机制下层植被模式可以提供见解生态系统动力学。科琳娜·塔妮塔从未想象过生物学将是她的命运。作为三次罗马尼亚人数学奥...


2023-03-24   Video
Niche Partitioning and Species Coexistence

Keywords:

NARRATOR: African savannas are famous for their diversity of large mammals. But how do so many similar species coexist in the same place? Princeton University biologist Rob Pringle i...

旁白:非洲大草原以其多样性而闻名大型哺乳动物。但这么多人是怎么做到的相似物种在同一个地方共存?普林斯顿大学生物学家Rob Pringle被这个问题迷住了。这是一个持久的生态学的奥秘。他的团队正在莫桑比克戈隆戈萨国家公园。他们的重点是三个紧密...


2023-03-20   Video
How Termites Enrich Ecosystems

Keywords:

So termites build these huge, huge mounds. And inside the mound, there's a great deal of activity that's going on. So termites go out. They forage for plant material, which they find in actual...

所以白蚁建造了这些巨大的土堆。在土堆里,有很多东西所以白蚁会出去。它们寻找植物材料在实际的植物、垃圾或动物中发现粪。他们把那株植物带回来了材料到巢。他们把它分解了。他们吃它。在这个过程中,它们以某种形式产生大量的营养物质这种氮和磷。此外,如...


2023-03-16   Video
The Origin of Flight - What Use Is Half a Wing

Keywords:

KEN DIAL: The evolution of flight in birds has long been a great scientific puzzle. Fossil evidence from the past 40 years has established that birds descended from theropods-- a linea...

KEN DIAL:进化论鸟类飞行长期以来一直很棒科学谜题。化石证据来自过去40年已经确定鸟类兽脚类恐龙的后裔--两个血统腿恐龙其中包括具有它们身上的羽毛和武器。但那些早期动物不会飞。那么,鸟类是如何飞行的呢?一个新的假设来自我对幼鸟的研究他...


2023-03-11   Pre-Intermediate
‘Many Moons’

Keywords:

Princess Lenore loved cakes.She once ate so many that she became sick.And the king's doctor could do nothing to help her.The king promised his little daughter anything she wanted if she would just get...

勒诺公主喜欢蛋糕。她曾经吃了太多,以至于生病了。国王的医生也帮不了她。国王答应他的小女儿,只要她能好起来,什么都可以。勒诺说她想要月亮。如果她有月亮,她会好起来的。国王召见了他的重要官员——高级大臣。他是个又大又胖的人,戴着厚厚的眼镜。国王...


2023-02-28   Video
How We Get Our Skin Color

Keywords:

Skin covers all our bodies, but its color varies from person to person. To understand why, we need to peer inside its layers. [music plays] Skin cells and their allies--hair, sweat an...

皮肤覆盖我们的全身,但它的颜色各不相同从一个人到另一个人。为了理解为什么,我们需要窥探它的内部。[音乐播放]皮肤细胞及其盟友——毛发、汗液油腺——形成第一条线保护环境。皮肤的三个主要层每个都是不同的细胞群落不同的工作。看看是什么赋予了皮肤颜...


2023-02-22   Video
Measure Mammal Extinctions at the John Day Fossil Beds

Keywords:

ANTHONY BARNOSKY: Species do not last forever. You can think of species a lot like you think of a human lifetime. They have a beginning and they have an end. SPEAKER 1: Anthony Barnosky...

ANTHONY BARNOSKY: 物种 不要永远持续下去。 您可以想到 物种很像你 想想人的一生。 他们有一个开始 他们有尽头。 演讲者 1: Anthony Barnosky 和凯特琳·马奎尔 是古...


2023-02-13   British English
Multicultural London English

Keywords:

Britain. Linguistics. Argot bargy. Why urban teenagers speak the way they do? In her novel “White Teeth”, published in 2000, Zadie Smith noted that in London, “all kids, whatever their nationali...

英国 语言学 方言来袭 城里的年轻人为什么那样说话 扎迪史密斯在2000年发表过一部小说,名字叫《白牙》,在书中,她提到在伦敦,所有的孩子,不管他们来自哪里,似乎用牙买加口音表达自己的鄙视。从那时起,语言学研究者逐渐明白了如何以...


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