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That's an unnatural act for a rocket. 这对于火箭来说，不是一种自然的行为。 The third stage has a camera. 第三次发射，火箭上有一个摄像机。 We call it rocketcam. 我们称之为火箭摄像机。 And it's pointed at th

TED演讲 第7期:从20马赫的滑翔机到蜂鸟无人机的感想(2)

40 years later, aero experts coined the term transonic. 40年后空气动力学专家创造了跨音速这个术语。 They debated, should it have one S or two? 他们争论这个术语应该用一个S，还是两个S? You see, they were having trou

5-11 慈母颂

Mother Machree There's a spot in my heart which no colleen may own; There's a depth in my soul never sounded or known; There's a place in my memory my life that you fill; No other can take it no one e

晨读英语美文60篇六级33

Mother Machree 慈母颂 Theres a spot in my heart which no colleen may own; Theres a depth in my soul never sounded or known; 在我心中有那么一隅， 任何少女也不能占据。 它埋在我灵魂的深处， 我从不声张从不表露。

太阳科普 第16期

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VOA慢速英语2014 Young Technology Expert Works to Stop Car Thefts

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After a while, having proved his good qualities by barking away a set of pilferers, 又过了一段时间，它的优良品质得以很好地展现。 who were making an attack on the great pear tree, he was admitted into the house, 小狗用叫声吓走

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【荆棘鸟】第三章 15

我希望你能告诉我，妈。 她叹了口气，合上了古钢琴，抹掉了手指上的金粉。没什么可说的，根本就没有什么可说的。得了，帮我把这些东西挪到屋子中间去，这样你爸就好包装了。 这次航程

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Expedite climb to FL190. 21.加速上升到高度190。 Climb to FL280 expedite until passing FL180. 22.上升到高度280，快速通过高度180。 Unable to expedite climb due weight. 23.由于重量原因不能加速上升。 Descending immediate

VOA常速英语2007-Chuck Yeager Broke Sound Barrier 60 Years Ago

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Before we take this giant leap, we need to be able to carry everything needed for a three-year -round trip with us. This is a much larger effort than getting to the moon. Its the Apollo mission on steroids. At this point we know at least as much as t

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人民币汇率中间价降至五年低点

Chinas central bank set its daily currency fix at the lowest level in five years, tracking a weaker market price as the dollar rally took its toll on the renminbi. 中国央行将每日人民币汇率中间价定在五年来的最低水平，以追踪较

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万物简史 第245期:马斯特-马克的夸克(17)

At least the names for the two main possible culprits are entertaining: they are said to be either WIMPs (for Weakly Interacting Massive Particles, which is to say specks of invisible matter left over from the Big Bang) or MACHOs (for MAssive Compact