英语听力文摘 English Digest 165、Can Fish Smell?

Y: I noticed that fish have holes that look like nostrils, does that mean they can smell? D: Smell, or olfaction, as scientists call it, is an important sense for many fish. Those little holes that look like nostrils are called nares. Nares dont lead

英语听力文摘 English Digest 173、如鱼得水

D: OK, Yael, you want to build an aquatic robot,and you're trying to figure out the most efficient way to move it through water, what do you do? Y: I am guessing the answer isn't to build a robot using a lot of root-force to move forward? D: Anyone w

英语听力文摘 English Digest 177、保护牙齿

Getting Rid Of Cavities 牙痛是继续忍受还是提前做好防护?爱护牙齿，每天的必修课。 M:Sorry,I'm late.I was brushing my teeth. W:Brushing your teeth?Right before 'A Moment Of Science'? Why? M:I'm trying to get rid of a cavity. W

英语听力文摘 English Digest 179、偶尔的“山顶洞人”

Sometime Cavemen 我们的祖先是否一直生活在一个地方呢？山顶洞人就一直生活在山洞里吗？ From the bestselling novel Clan of the Cave Bear to the 1981 movie Caveman, pop-culture tends to misrepresent prehistoric people as c

英语听力文摘 English Digest 193、怎样哺育孩子

What Time Of Day Is Best To Feed Infants So That They Fall Asleep 把孩子养大可不是一件容易的事。婴儿没有时间观念，他可不管自己的爸爸妈妈累了一天晚上需要休息。更要命的是，孩子似乎觉得晚上的安

英语听力文摘 English Digest 194、limelight的起源

Where Does The Term'Limelight'Originate You're in the limelight now on this moment of science. If someone loves being in the limelight, that means they enjoy being the center of attention. We use the word now to mean social prominence, but have you e

英语听力文摘 English Digest 200、疼痛感受器

Hey! and thenOuch! 伤害性刺激作用于末梢神经引起神经兴奋电活动，沿着脊髓传人神经纤维中的细纤维(A和c纤维)传人脊髓，进而引起痛觉。痛觉是由于痛觉感受器受刺激而诱发的，其他感受器受到

英语听力文摘 English Digest 214、动作与大脑

Word Up, Brain 新发展起来的大脑皮层在调节机能上起着主要作用；而皮层下各级脑部及脊髓虽也有发展，但在机能上已从属于大脑皮层。高等动物一旦失去大脑皮层，就不能维持其正常的生命活

英语听力文摘 English Digest 215、会“溜”的悠悠球

What Makes a Yo-Yo Yo 悠悠球(YO-YO) 并非一个令人陌生的词眼，史书的最早记录出现在公元500年前的希腊;相传16世纪，菲律宾的狩猎民族在狩猎和格斗使用的器具中，在绳子的前端挂着重物似悠悠的

英语听力文摘 English Digest 222、水星的样子

Whats It Like There? 水星 (Mercury )，中国古代称为辰星。是太阳系中的类地行星，其主要由石质和铁质构成，密度较高。自转周期很长为58.65天，自转方向和公转方向相同，水星在88个地球日里就能

英语听力文摘 English Digest 286、变性的青蛙

Gender-Jumping Toads 美国研究人员说，常用除草剂阿特拉津会令雄蛙变性为雌蛙。美国加利福尼亚大学伯克利分校研究人员把40只雄性非洲爪蛙放入阿特拉津浓度为10亿分之2.5的水中，发现90%雌性化

英语听力文摘 English Digest 272、测谎仪

Lying to a Machine 不说谎的人觉得它很神秘，说谎的人觉得它很可怕，这就是神奇的测谎仪。面对不断攀升的犯罪，善良的人们总是期望借助科学的灵丹妙药，将所有犯罪分子手到擒来。测谎技术

英语听力文摘 English Digest 276、飞机的凝迹

Airplane Contrails Have you ever seen a perfectly cloudless sky? Cloudlessthat isexcept for two or three long white lines smeared across the perfect blue sky by airplanes like smudges on a pane of glass. Why do airplanes sometimes leave contrails beh

英语听力文摘 English Digest 278、形态各异的狗

Mans Best Friendin All Shapes and Sizes Scientists are making great strides in understanding the genes that allow such a wide range of shapes, sizes and personalities in different dog breeds. Did you know domestic dogs were bred from wolves about 15,

英语听力文摘 English Digest 280、飞盘为何会飞？

Why Frisbees Fly With a gentle flick of the wrist on a warm summer day, you can launch a frisbee on a long and graceful flight. Why do they fly so well? One reason is something called gyroscopic force. This is the tendency of a spinning object to mai

英语听力文摘 English Digest 282、你相信有吸血鬼吗？

Who Believes in Vampires? 吸血鬼，傳說中永生不老的超自然不死生物。吸血鬼的典型形象和特征是：牙齒尖長，皮膚白皙，眼睛发红。吸血鬼害怕照射到陽光，在太陽下會烧起来变成灰。但是也认为

英语听力文摘 English Digest 247、呼吸甲烷

A Fresh Breath of Methane 很早很早以前地球有很微量的氧气，而且地表状况十分恶劣。大气主要是N2和Co2，后来通过复杂的变化，地球开始出现了厌氧型生物。在生命的作用下，地球的氧气开始不断

英语听力文摘 English Digest 270、单腿站立的鸟

Cold Feet and Hot Wings 鸟通常只在休息或睡觉的时候才单脚站立。鸟类学家认为，他们这么做是为了减少能量的消耗，并把一只脚收到翅膀之下休息，通常他们会交替使用两只脚独立。披着一身羽

英语听力文摘 English Digest 258、“哈比人”

Small People 佛罗勒斯人（Homo floresiensis）是近年发现的一种史前人类，为人属的一种，主要特征是体型小，大脑小，因此也被化名作哈比人。 一般认为他们与现代人类曾经生活在一个时代。他们

英语听力文摘 English Digest 264、马腿为什么那么瘦？

Skinny Legs and All Why do horses have skinny legs? Find out on this Moment of Science. Why do horses have skinny legs? Okay, they arent entirely skinny its mostly the (1)bottom half, with a big muscle up at the top.Thats odd. Human legs are kind of