红细胞大致呈圆盘状。
那些色彩在一张圆盘上旋转，并被反射到后面的墙上。
The colours rotated around on a disc and were reflected onto the wall behind.
它看起来像一个巨大的圆盘。
如果是这样，那么第一个圆盘形状的符号可能代表太阳。
If so, then perhaps that first disc-shape symbol might represent the Sun.
第二个问题是，当金星在太阳圆盘外被观测到时，它会呈现出光晕。
The second problem is that Venus exhibits a halo of light when it is seen just outside the Sun's disc.
他意识到，从不同的纬度上看，行星穿过太阳圆盘的路径似乎会不一样。
He realized that, from different latitudes, the passage of the planet across the Sun's disc would appear to differ.
行星被认为是由围绕恒星旋转的气体和尘埃组成的圆盘中的粒子累积而成。
Planets are believed to emerge from the accretion of particles in a disk of gas and dust as they whirl around the star.
这种以每秒数百公里的速度旋转的运动，可能会使圆盘上的物质呈现出螺旋形状。
This spinning motion, at speeds of hundreds of kilometers per second, may cause matter in the disk to take on a spiral shape.
当第一次用望远镜观测到火星时，人们从飞机上看到，火星的圆盘在地球上纵横交错。
When the planet Mars was first observed through a telescope, people saw that the round disk of the planet was crisscrossed on earth that are viewed from an airplane.
当第一次用望远镜观测到火星时，人们从飞机上看到，火星的圆形圆盘在地球上纵横交错。
When the planet Mars was first observed through a telescope, people saw that the round disk of the planet was criss-crossed on earth that are viewed from an airplane.
从一端到另一端，银河系布满星星的圆盘横跨12万光年，可以用肉眼和光学望远镜观察到。
From end to end, the Milky Way's starry disk, observable with the naked eye and through optical telescopes, spans 120,000 light-years.
当金星开始穿过太阳的圆盘时，它看起来有斑点，不是圆形的——这使得确定时间变得困难。
When Venus begins to cross the Sun's disc, it looks smeared not circular—which makes it difficult to establish timings.
圆盘产生自己的引力拖曳，这种相互作用的力夺走了行 星在其轨道上的动量，迫使它盘旋向恒星的方向。
The disk exerts its own gravitational tug, and this interplay of forces robs the planet of momentum in its orbital path, forcing it to spiral in toward the star.
圆盘似的月亮会高悬在夜空中，将柔和的月光洒向世间万物。
The moon's round orb would shine high in the sky, casting its velvety light on everything.
这些圆盘是行星形成的剩余物质。
现在我们拿这个法向量向上的圆盘。
移动面积为1的也就是最小的圆盘。
现在圆盘浮在，逃出气体的上方。
当然了，最佳选择是用单位圆盘。
Now, of course the smart choice would be to just take the flat unit disk.
假设车里有个圆盘，半径为半米。
Suppose you had a disk in your car which had a radius of half a meter.
对圆盘，我们只需要，算出转动惯量。
For the disk, all we have to do now is calculate the moment of inertia.
奖章圆盘的正面是阿拉斯泰尔·坎贝尔。
这是圆盘，我们刚讨论过,绕质心旋转。
So this is a disk, and we just discussed the rotation about the center of mass.
它这样旋转，垂直于圆盘。
And so it was rotating like this and was perpendicular to the disk.
这些圆盘正被激活形成12个螺旋漩涡。
因为这是半径为1的圆盘。
你也可以用杆子和圆盘。
圆盘旋转着飞入空中。
取这个圆盘的平面。
也可以让圆盘和摆。
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