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听力等级

科学研究   

2022-11-18   Video
Genetic Engineering & Our Food

Keywords:

GMOs are one of the most controversial areas of science. Genetic engineering is used in many fields, but even though medical applications like GM insulin are widely accepted, The debate heats up...

转基因生物是最具争议的科学领域之一。 基因工程用于许多领域,但即使转基因胰岛素等医学应用被广泛接受, 当涉及到食品和农业时,争论愈演愈烈。 为什么? 为什么对同一事物的处理方式如此不同? 让我们试着弄清楚这个问...


2022-11-16   Intermediate
‘Becoming Human’

Keywords:

Steve: So Graham, this is pretty exciting series of programs. Just give us a general idea of what the audience is going to be in for? Townsley: What we are trying to do in this NOVA series is a numbe...

Steve:Graham,这是一系列非常令人兴奋的节目。请给我们大致了解一下观众会喜欢什么? Townsley:我们在这个 NOVA 系列中试图做的是很多事情。我们试图创造、讲述人类进化的整个宏大故事,从我们与猿类分裂开始,再次导致我们自...


2022-11-15   British English
Countries' Rates of Physical Activity

Keywords:

Science and technology. Global health. One potato, two potato, three potato. An effort to count the world's sloths. A PAPER in the Lancet, shamelessly timed to coincide with the Olympic games, c...

科技 全球健康 一个懒汉,两个懒汉,三个懒汉 来数一数世界上的懒汉 《柳叶刀》的一篇文章对世界各国人民进行体育锻炼的比率做了一个比较,而这篇文章的发表时间竟有意选在了奥运会召开之际。文章中的研究由巴西佩洛塔斯联邦大学...


2022-11-14   Intermediate
The Dene Allows Humans to Digest Lactose

Keywords:

Hawks: When you have a new mutation, one of the things about it is that [if] it is selected [it] increases [extraordinarily] slowly for a long time. Our best [estimate of] the age of the lactase [vers...

Hawks:当你有一个新的突变时,其中一件事是 [如果] 它被选中 [它] 会在很长一段时间内 [非常] 缓慢地增加。我们欧洲人对乳糖酶 [版本] 年龄的最佳 [估计] 约为 8,000 年。五千年前,这些新石器时代早期的头骨或骨骼,那些是...


2022-11-14   Video
To Understand Gravity, Toss a Hard Drive into a Black Hole

Keywords:

Gravity seems very familiar. After all, it's what makes stuff fall, it's what keeps the planets in their orbits, but thinking about the fundamental physics of gravity has led scientists to ques...

重力似乎非常熟悉。 毕竟,这就是 使东西掉落, 它使 行星在它们的轨道上, 但是考虑到 引力基础物理学 引发了科学家的质疑 太空的存在 和时间。 这是因为重力 则大不相同 来自其他力量。 那么,为什么重力如此独特呢...


2022-11-12   Intermediate
Lucy's Legacy, The Quest for Human Origins

Keywords:

Steve: Lucy's Legacy: The Quest for Human Origins with the discoverer of the world famous Australopithecus skeleton known as Lucy, Donald Johanson. The title is Lucy's Legacy. What is Lucy's legacy? ...

史蒂夫:露西的遗产:寻找人类起源与世界着名的南方古??骨骼发现者露西 Donald Johanson 一起。标题是 Lucy's Legacy。露西的遗产是什么? Wong:这意味着很多事情。首先,当约翰逊和汤姆·格雷在 1974 年发现...


2022-11-10   Intermediate
The Incredible Story of Human Life in Britain

Keywords:

Stringer: Obviously there was an old view that when people got into Britain half a million years ago, they were always here right through to the present. And we now know that's completely wrong; [that...

斯金格:显然,有一种古老的观点,当人们在五十万年前进入英国时,他们一直在这里直到现在。我们现在知道这是完全错误的;实际上,大约每十万年就会发生一次,当冰河时代的高峰期出现时,英国的人口被完全清除,然后不得不重新殖民。[而且]值得注意的是,在...


2022-11-10   Video
Did Your Catalytic Converter Get Stolen

Keywords:

Andrew Robinson: This is the most valuable metal on the planet. More valuable than silver, gold, platinum, or even this jewelry. It’s this powder right here. This jewelry is being treated with a th...

Andrew Robinson:这是地球上最有价值的金属。 比银、金、铂甚至这些珠宝更有价值。 就是这种粉末。 这款珠宝经过一层薄薄的铑涂层处理,铑是一种化学惰性、耐腐蚀的金属。它可以保护银色并赋予其漂亮的光泽。 但你可能每天都使用...


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