We need to foster an awareness of film sound as well as film space so as to truly appreciate an art form that sprang to life during the twentieth century — the modern film.

我们需要培养对电影声音和电影空间的认识，以便能真正欣赏一种在二十世纪蓬勃发展起来的艺术形式——现代电影。

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These speculations sound like science fiction. But the theory of black holes in space is accepted by many serious scientists and astronomers.

这些设想听起来像科幻小说，但空间中黑洞的理论被许多严谨的科学家和天文学家接受。

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Still, it's a basically sound decision, because it saves a fair bit of space.

不过这是一个非常合理的决定，因为这样可以节省相当多的空间。

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Before being chosen in 1962 as one of the "Group II" astronauts -- which included Apollo 13 commander James Lovell along with such legends as Frank Borman, Pete Conrad and John Young -- Armstrong was one of the elite pilots selected to fly the X-15 rocket plane up to five times the speed of sound and toward the edge of space.

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As soon as the brain gets confusing signals from the two ears it stops using stereo separation as a way of distinguishing sound in space.

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"Together, we proved that a human in freefall can break the speed of sound returning from near space, going through a transonic phase and landing safely on the ground, " said Dr Jonathan Clark, a former space shuttle flight surgeon and the Red Bull Stratos medical director.

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