Then, if you had a flat disk with the curve going counterclockwise, the normal vector would go up.

就会得到一个被逆时针曲线包围的圆盘，法向量向上。

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Spiral galaxies, such as the Milky Way, consist of a flat disk with a bulging center and surrounding spiral arms.

象银河系一样，螺旋星系由一个中间鼓起的扁圆盘和环绕在周围的螺旋形手臂组成。

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Elliptical galaxies do not take on the flat-disk or spiral shapes that most galaxies do.

椭圆星系并不具有大多数星系具有的扁圆或是螺旋型的形状。

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The photo shows the plane of the Milky Way, which is often described as looking like two fried eggs back-to-back, with a flat disk in the middle.

MSN: New Milky Way photo captures 1 billion stars

Both Dell and HP have downbeat expectations for the quarter, and disk-drive maker Seagate has projected flat sequential growth for the quarter.

FORBES: Intel: Will They Cut Guidance For The September Quarter?

In an interview with Forbes this morning, Seagate CEO Steve Luczo said the company is expecting the total addressable market for the disk-drive sector in the June quarter to be flat to down slightly from the March period, which he says is typical for the period.

FORBES: Update: Seagate Falls After Deal; June Qtr Guidance Disappoints