单词:double protractor
单词:double protractor 相关文章
If it points the camera forward, at first it sees only black. But as it moves toward the heart of the black hole, it encounters the most bizarre place in the universe. A black hole in massive gravity holds everything down to an unimaginably small poi
A supermassive black hole is quite simply gravity gone mad. An object of such concentrated matter its gravitational pull is insatiable. Nothing can escape it, not even light itself. Anything that gets
In either case, get ready for a really big bang. 无论哪种情况,准备好来一次真正的大爆炸。 Naturally, you will wish to retire to a safe place to observe the spectacle. 很自然,你希望退避到一个安全的地方来观察这个
今天我们要学的词是resolution。 Resolution, 是决心,决定的意思。新年新气象,Have you come up with your New Year's resolution yet? 你有什么在新的一年里决心要做的事情吗?About half of Americans make New Year'
JEFFREY BROWN: Now, mining technology to solve the world's problems. NewsHour economics correspondent Paul Solman recently traveled to California and filed this report on someinnovative thinkers. It's part of his ongoing reporting Making Sense of fin
Voice 1 Welcome to Spotlight. Im Christy VanArragon. Voice 2 And Im Joshua Leo. Spotlight uses a special method of broadcasting. It is easier for people to understand - no matter where in the world they live. Voice 1 Every day, Ray Kurzweil swallows