用mp3背四级单词57

scratch-抓,刮,擦,刻划 screen -屏幕,荧幕 screw -螺丝 script -剧本,广播稿 seal-封条,图章 secondary -次要的,第二的 sector -扇形,部门,战区 secure -安全的,可靠的 segment-部份,断片 select -选择,挑选 selfish -自私的,利己的 semester -学期 semiconductor-半导

波兰建造太阳能自行车道 夜里发出蓝光

Poland unveiled a gorgeous, glowing bike path in the Mazury region to help nighttime cyclists get from A to B. 波兰马祖里地区近日建成一条精美绝伦、闪闪发光的自行车道，以帮助夜间骑行者从甲地骑到乙地。 The 10

VOA标准英语2012--Gene Therapy Halts Vision Loss in Dogs

Gene Therapy Halts Vision Loss in Dogs Researchers have stopped vision decline in dogs with an inherited disease that causes blindness. The gene therapy technique they used may someday stop vision loss in humans. Retinitis pigmentosa (RP) is an eye d

美国科学60秒 SSS 2015-01-06

Sometimes it is hard to see the light, especially it lies in the invisible spectrum, like ultrared, ultraviolet radiation. But if you long to see the unseeable, you might interested to hear that under certain conditions people can catch a glimpse of

美国英语听力80篇2 Lesson36

[00:06.37]Some people cannot see all colors correctly. [00:10.92]They cannot see all the colors in a rainbow or a sunset. [00:16.40]They cannot tell if the meat they are cooking is done or if a fruit is ready to be eaten. [00:23.61]Poor color sight a

人教高中英语高二下UNIT12-3

MR CAVORS FLYING MACHINE When I first met Mr Cavor, he was about to finish building the machine in which he planned to travel to the moon. As it had neither wings nor an engine, I was amazed and asked him how his machine could fly. The secret lay in

英语听力文摘 English Digest 529、夜视为何看不见颜色？

Night Vision And Humans: Why Cant We See Color? When we are in a fairly dark room, or outside at night away from lights, we can still see, but we cant see the colors of things very well. Why is that? There are two kinds of light-sensitive organs loca

经济学人09:光电池 利用染料进行能量转化

Science and technology. 科技。 Photoelectric cells. 光电池。 To dye for. 利用染料进行能量转化。 A new type of cell may bring solar energy indoors. 一种新型电池也许能带来室内太阳能。 THE phrase indoor solar power sou

高中英语第二册课本朗读12-work

Mr Cavors Flying Machine When I first met Mr Cavor, he was about to finish building the machine in which he planned to travel to the moon．As it had neither wings nor an engine，I was amazed and asked him how his machine could fly．The secret lay

VOA慢速英语2014 高新技术材料给建筑降温,将热量送入太空

High-Tech Material Cools Buildings, Sends Heat Into Space 高新技术材料给建筑降温,将热量送入太空 Researchers at Stanford University have developed a new material that can move heat out of buildings and into space. The researchers say

VOA标准英语2010年-Nobel in Physics Awarded for Super-Str

Russian-born Andre Geim and Konstantin Novoselov, both from Manchester University in Britain, won the prize for their groundbreaking experiments with graphene, a microscopic flake of carbon. The pair first extracted the super-thin flake from a piece

VOA标准英语2014--Scientists Create Blackest Material Ever

Scientists Create Blackest Material Ever Of all the black things in the universe only the infamous black holes are so black that not even a tiny amount of light can bounce back. But scientists have managed to create material almost as black, and it h

英语听力：自然百科 已知的宇宙：外星生命 Alien_Contact-5

Because from trillions of miles away, these small planets get lost in the blinding glare of their stars brightness. The sad truth of the matter is that earth-like planets are near cosmic specks of dust. And therefore detecting them is really quite ha

【英语时差8,16】猫咪和颜色

Cats And Colors You can look at that quilt your cat is curled up on and see a patchwork of greens, blues, and yellows. Your cat, however, cannot see color variation in the quilt. And here is why. Both humans and cats depend on the back layer of the e

经济学人: 海洋生物的隐身斗篷 (1)

THE ocean is dark and full of terrors, and the black dragonfish is the darkest of them all. 海洋中充满黑暗与恐惧，黑色的深海龙鱼是其中最黑暗的生物。 Its surface, new measurements reveal, is as black as the blackest materia

经济学人19:光电池 室内太阳能

Science and Technolgy. 科技。 Photoelectric cells. 光电池。 To dye for. 染料光电池。 A new type of cell may bring solar energy indoors. 一种新型电池有望将太阳能引进室内。 THE phrase indoor solar power sounds like an oxym

【时间旅行者的妻子】16

Clare counts. I race around picking underwear and socks from the floor, collecting spoons and coffee cups from various horizontal surfaces and chucking them into the kitchen sink. As she says Nine hundred and sixty-seven, I remove the tie from her ey

新型显示屏薄如纸张 可随意弯曲

最近有科学家正在研发一种全新的电子纸技术，这种电子纸其实就是一种超薄的柔性显示屏，具有很高的能效性，并且在阳光直射或明亮环境中也可以清晰地显示出内容。这种柔性显示屏的厚

英国学生科学读本 第32期:一块软木(1)

Lesson 32 Only A Cork 第32课 一块软木 Corks are so cheap and so common, that every child who reads this Lesson can get a cork to handle and to look at. Let us try with a pen-holder to keep a cork down at the bottom of a glass of water. It is ve

英语听力文摘 English Digest 186、猫与色彩

Cats And Colors 人类能够很容易的分辨出不同的颜色。那么猫呢？虽然猫的视力很好，即使在非常昏暗的光线条件下也能看见，但它对于如何分辨不同的颜色似乎并不擅长。 Cats and Colors on this mo