单词:light-flux surface density
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DAVID GREENE, HOST: This summer, smoke from wildfires has blanketed much of the West for days, even weeks. And that smoke has come in between the sun and ripening crops, which has become a worry for farmers. The Northwest News Network's Anna King rep
Whether it was believed to have been a big ball of cheese home to the men in the Moon, or possess the power to turn people into werewolves, the Moon has been a perpetual source of wonder from ancient times to today. Just one quarter the size of Earth
The Moon We find that the moon is about 239,000 miles (384,551 km) away from the earth, and, to within a few thousand miles, its distance always remains the same. Yet a very little observation shows that the moon is not standing till. Its distance fr
The winter solstice events at Maeshowe demonstrate 梅萧韦古墓葬的冬至事件 an intimate and precise knowledge of 展现了古人 the sun's movements through the sky. 对太阳运行轨迹的精确了解 It was the first step on ourjourney to
But to fully forecast the floods, he needs a lot more atmospheric data. He believed robotic drone aircrafts developed for the military could continue to measure the air over the oceans, charting its temperature, wind and humidity. And the flight coul
Lesson 99 Fishing in the Fog 雾里捕鱼 Words: flint n. 打火石 flip adj. 无礼的,轻率的 float v. 漂浮,使漂浮 flock n. (禽兽等)群,大量;v. 蜂拥,群集 flora n. 某一地区或时期的植物总称 flounder n. 比目鱼 flourish vi. 繁荣,茂盛;健康成长;n. 挥舞 flou
(Woman) Today I want to talk about the Earth's last major climatic shift, at the end of the last ice age. But first, let's back up a moment and review what we know about climatic change in general. First, we defined climate as consistent patterns of
Well, hearing that Odyssey had found subsurface water on Mars was enormously exciting for somebody who is involved in planning to send humans to Mars. Water has a number of important uses for us. At t
-Im Chris Kaufman and I here with Justin Kasper, who works at Smithsonian, hes an astrophysicist at the Smithsonian. And he's won a project thats gonna launch a probe at the sun, specifically the Solar Wind Electrons Alphas and Protons investigation,
Scientists and politicians have gathered in the Indonesian city of Manado for the World Ocean Conference. They are discussing the role of oceans in mitigating climate change and how climate change affects the world's seas, but their efforts are hamp
Todd: So one very popular conspiracy theory is the moon hoax. Jonathan: Yes, that's always a very funny one to hear people talk about. They saw this one program on Fox which had five or six points which look so impressive, you know, when you've got t
Just as I arrived at UCLA with my first faculty position, everything was falling into place in terms of the ability to answer this question at the centre of our galaxy. The telescopes were getting bigger so you had the due ability to see fine details
Science and technology 科学技术 Navigation 航海 Crystal gazing 水晶球观海术 A mineral found in a shipwreck was an ancient form of compass 在沉船里发现的矿石是古代的一种指南针 THIS may look like a nondescript lump of rock
The twilight zone refers to the area between 100 and 1000 metres deep where a small amount of sunlight can still penetrate. The region is packed with ocean life that plays a key role in keeping atmospheric carbon-dioxide levels 30-percent lower than
Looking up at the night sky, we are amazed by how it seems to go on forever. 仰望夜空,我们为它的永无止境而感到惊讶。 But what will the sky look like billions of years from now? 然而数十亿年前的天空又会是什么样子呢
Chicxulub is buried under two to three kilometers of limestone and mostly offshore, 奇克休留布大坑在两三公里的灰岩深处,而且大部分在近海。 which makes it difficult to study, Anderson went on, while Manson is really quite ac
台湾籍旅美老师今天交给我们的句子是: If our lungs were shaped like balloons, air that was not in direct contact with the balloon's inner surface couldn't diffuse through. Luckily, our lungs' architecture ensures that very little oxy
By bending arms and legs or angling her bodypresenting more or less surface area to the groundshe can change her rate of fall, slowing or speeding up her terminal velocity around ten or twenty miles per hour. To fall as fast as two hundred miles per