This distance is known as the 'astronomical unit' or AU.
这个距离被称为“天文单位”或 AU。
If this distance is large in comparison to the wavelength, this dam simply casts a shadow.
如果这个距离比波长大，那么这个水坝就会投下阴影。
Glowing plants could reduce this distance and therefore help save energy.
发光植物可缩短这一距离，因此有助于节能。
And we'll make this distance l.
用l表示这个距离。
D This distance I will measure for you, d.
下面我来为大家测量一下距离。
This distance helps prevent infection.
这段距离帮助预防感染。
This distance is the same as this distance.
这段距离和，这段距离相同。
Y so this distance is also y, same as that.
这段距离也是。
So when is it here and what is this distance?
什么时候到这里，这段距离是多少？
So the radius will just be this distance here.
所以半径就是这里的距离。
He walked this distance each early morning.
他每天很早都要走这段路程。
So we can start. This distance here is r naught.
所以我们开始。这里的长度是r圈。
I can hardly remember him at this distance of time.
时间隔得这么久，我已几乎记不得他了。
Marsden told us that 000 this distance here is about 10,000.
马斯登告诉我们,这距离约为10
Well, what is this distance? It is just y,or maybe absolute value of y.
这里的距离是什么？是y，准确地说是y的绝对值。
From this distance, the left and right models look pretty much the same.
从这个距离看，左边和右边的两张图看起来基本是一样的。
Juno traveled this distance, from the Earth to the Moon, in less than a day.
要走完地月之间的这段距离，朱诺探测器可花不了一天。
To reduce this distance, they focus on creating a carefully structured cathode.
为减少这段距离，他们专注于开发一种结构精密的阴极材料。
To know how to calculate this distance automatically, here's the key insight.
为了知道如何自动计算这个距离，这儿有一个关键的直觉。
Similarly, this distance, the length of delta r is not exactly the length along the curve.
同样地，这个距离，△r的模也不完全等于它跨过的弧长。
From this distance, oceans, land, clouds, and ice blend into a blur of light, a mere dot against the vastness of space.
在这个距离上，海洋、陆地、白云和冰雪全部被融入一个光斑之中，只是浩瀚的宇宙中的一个小光点而已。
So, that means that this distance on the road is actually equal to the distance here on the circumference of the wheel.
这就意味着，这段距离，等于车轮边缘的这段距离。
And let's assume that this structure is very lightweight, so that we can ignore that, and let this distance be ten meters.
假设这个结构，非常非常轻，轻到可以忽略，这段距离是10米。
This distance was based on the historical fact that it was that far from Winsor Castle to the royal viewing box during the 1908 Olympics in England.
这个距离是有历史依据的，它的数值正好是1908年英国主办奥运会时从英国的温莎城堡到皇家包厢的距离。
At this distance the optical light from stars is shifted, or stretched, to infrared wavelengths that can only be observed in outer space by Spitzer.
在这个距离，恒星的光源光被折射，或拉伸成红外波长，在外层空间只有斯皮策太空望远镜才能观测到。
Secondly, even though other objects are visible at this distance, according to Shuttle astronaut Jay Apt, the Great Wall is barely discernable, if not invisible.
其次，根据航天飞机宇航员杰伊·阿普特的说法，在这个距离能看到其他物体，不能说看不到长城，但是只能勉强辨别出来。
Secondly, even though other objects are visible at this distance, according to Shuttle astronaut Jay Apt, the Great Wall is barely discernable, if not invisible.
其次，根据航天飞机宇航员杰伊·阿普特的说法，在这个距离能看到其他物体，不能说看不到长城，但是只能勉强辨别出来。
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