标签：gravity 相关文章
Except for the ruffling of waves, and the pull of the tides, you probably think of the ocean as pretty flat. You wouldn't expect it to have a geography, its waters piled up into lasting hills or sunk into valleys. Sea level ought to be pretty level,
英语时差8，16
Day 2 abase降 altitude高处 ascend上升 alight落下 acme顶点 bounce弹跳 compassn指南针 climax高潮 decline下降 descend下去 enhance提高 democracy民主 gravity 重力 hoist升起 inferior差的 hierarchy层次 likelihood可能性 plummet垂直向下 radar雷达 pitch 投掷
80天攻克雅思核心词汇
As we enter the film awards season, the debate is on over which movie was the best of 2013. And a number of filmmakers, actors and artists are weighing in with their choices. Kevin Macdonald, Director, said, My favorite movie of the year? Well you kn
CCTV9英语新闻2013年12月
8. Education is ____ for the development of a country. A. indispensable B. accountable C. deliberate D. deficient indispensable a.不可缺少的 n.不可缺少之物 accountable 可计算的 account
新东方赵丽词汇课堂
Has Earths Gravitational Pull Been Changing? 地球的引力改变过吗？ Don, why are you slouching? Dont you know its bad for you? 唐，为啥你无精打采？你不知道这对你不好？ Did you know that about 200 tons of debris strike the
初学者听力文摘精选
NASA's GRAIL to Map the Moon The U.S. space agency NASA is preparing to launch a new, nearly half-billion dollar lunar mission that will enable scientists to better understand the moon's gravitational field and the lunar interior, from crust to core.
VOA标准英语2011年(九月)
NASA Probe Proves Einstein Right Albert Einstein was right. The U.S. Space Agency (NASA) released data this week from its Gravity Probe B spacecraft, whose primary mission while in Earth's orbit was to test Einstein's 1916 Theory of Relativity. While
VOA标准英语2011年(五月)
RACHEL MARTIN, HOST: One of the most famous scientists of our time has died. Stephen Hawking was a theoretical physicist whose early work on black holes transformed how scientists think about the nature of the universe. But his fame wasn't just a res
2018年NPR美国国家公共电台3月
GUY RAZ, HOST: Hey, Naomi, can you just quickly introduce yourself? NAOMI ORESKES: I am Naomi Oreskes. I'm the professor of the history of science and affiliated professor of Earth and planetary sciences at Harvard University. RAZ: So it's fair to sa
2017年NPR美国国家公共电台2月
Nature reports results from GRACE, a satellite machine designed to use gravity measurement to monitor the world's water resources. GRACE is the Gravity Recovery and Climate Experiment and it's a two-satellite machine. These two satellites are followi
自然百科2010年
Fact: liquid water is heavier than air. Fact: clouds, which consist of water droplets and ice crystals, seem to hover in the air. One final fact: the water droplets in a typical cloud together weigh many tons. Which raises a question: how do clouds s
英语时差8，16
Theres nothing anywhere near as extreme as a black hole. The disturbing truth about black holes is that there are boundary between the known universe and the place that would forever lie beyond the reach of science. They are in an anomaly of gravity
探索与发现2013年
Instead, it seems to be a gas cloud moving at huge speeds right in the direction of the black hole. But what really rang along bells was the way it had changed shape. We see that this gas cloud as it moves closer and closer to the black hole, is gett
探索与发现2013年
China is set to begin its historic moon-landing mission on Monday, with the launch of its Change-3 lunar probe. Preparations at the Xichang Satellite Launch Center have now passed the crucial fuel injection stage, the start of the main launch process
CCTV9英语新闻2013年12月
China successfully launched its first microgravity satellite, the SJ-10, at the Jiuquan Satellite Launch Center in Gansu province Wednesday at 1:38 am. 周三凌晨1时38分，我国首颗微重力科学实验卫星实践十号在甘肃酒泉卫星发射
英语新闻
As the sun rose, a dew drop became aware of its surroundings. There it sat on a leaf, catching the sunlight and throwing it back out. Proud of its simple beauty, it was very content. Around it were other dew drops, some on the same leaf and some on o
双语有声阅读
What makes the sun shine? For a lot of folks, this is the kind of thing that doesn't even require explanation: it just does. But just being a commonplace phenomenon in no way explains it. Something must cause the sun to shine. And, in fact, there is
英语时差8，16
You stop and I go 你停，我走 Too fast, much too slow 你快，我慢 Your uptown is downtown to me 你执着的我认为是消遣 I lose it, you find it 我丢了，你找回来 You're ahead and I'm behind it 你在前面，我尾随其后 Your
好听的英文歌曲
Did you ever dream of digging a hole so deep it came out the other side of the earth? Let's play that game again, using a little physics. First we have to imagine that our tunnel is lined with super-heat-resistant material so we can pass through laye
英语时差8，16
Last time we imagined a tunnel through the center of the earth. If such a thing existed, you could step into one end, fall all the way to the other side, and step out. Gravity would cause you to pick up almost exactly as much speed on the way down as
英语时差8，16