That's how long it takes the umbra to move over one spot on the Earth.

这就是扫过地球上某一点所需要的时间。

A partial eclipse is when the moon only gets covered by part of the Earth's umbra.

月偏食是指月球只地球遮住的情况。

Here's the penumbra, a partially shaded outer region surrounding the umbra, a fully shaded inner part that's darkened.

这是半区，一个包围了区的外区域，区是一个完全黑暗的内区域。

Instead, its umbra moves across the Earth.

相反，的在地球上移动。

People in the path of the umbra may see a total solar eclipse.

在路径上的人们可能会看到日全食。

When the umbra touches the Earth, we get a total solar eclipse.

接触地球时，我们会看到日全食。

Then, finally, the Moon's black disk completely covers the Sun — the umbra sweeps over your location.

最后，扫过你所在的位置时，黑暗的月球完全遮住了太阳。

The narrow shadow in the middle, where Earth is totally blocks the sun’s light, is called the umbra.

中间较狭窄的阴内，地球完全遮挡住了太阳光，这一阴成为。

As the Moon passes into the central part of the Earth's shadow, called the umbra, it darkens dramatically.

月球进入地球阴的中心，即时，会急剧变暗。

The umbra is gone, but you're still in the penumbral shadow.

已经移开，但你仍处在半中。

The earth's darker inner shadow is known as the umbra, and the lighter outer one is called the penumbra.

地球内较暗的阴称为，较浅的外阴称为半。

You're getting less light, and so you're technically shadowed, but it's not quite as dark as the umbra.

照在你身上的阳光减少，所以严格上说来你处于阴中，但并不像那么黑。

Once it's entirely within the umbra, the Moon appears a dim red due to sunlight scattered through the Earth's atmosphere.

一旦完全进入，由于阳光通过地球大气层散射，月球呈现出暗淡的红色。

That shadow is called the umbra and millions of Americans will be in it next Monday.

那个阴称为，下周一将有数百万美国人身处其中。

As the moon shifts deeper into the umbra, it takes on a red hue which is sometimes called a blood moon.

随着月亮遮蔽得更深，月亮会呈现出红色，有时这种月亮称为血月。

The moon's shadow, or umbra, is cast on the Earth, and anyone in the area of the shadow sees an eclipse.

月球的阴，或称，投射在地球上，任何在阴范围内的人都能看到日食。

The umbra is the dark part of Earth's shadow in a lunar eclipse and the moon shadow in a solar eclipse.

是月食时地球阴和日食时月球阴的黑暗。

There are a number of changes that happened in the places that are directly in the moon's umbra or shadow.

在直接位于月球或阴中的地方发生了许多变化。

There are no annular lunar eclipses, because the Earth is so big that its umbra always appears larger than the moon.

没有月环食，因为地球太大了，的总是显得比月球大。

Finally, the Moon starts to enter the Earth's umbra, and the real eclipse begins.

最后，月亮开始进入地球的，真正的月食就开始了。