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

就是本扫过地球上某一点所需要时间。

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

月偏食是指月球只被部分地球本遮住情况。

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

是半区，一个包围了本区外部区域，本区是一个完全黑暗内部区域。

Instead, its umbra moves across the Earth.

相反，本在地球上移动。

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

在本路径上人们可能会看到日全食。

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

当本接触地球时，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，当本扫过你所在位置时，黑暗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.

中间较狭窄内，地球完全遮挡住了太阳光，一部分成为本。

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

当月球进入地球中心部分，即本时，会急剧变暗。

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

本已经移开，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.

地球内部较暗被称为本，较浅外部被称为半。

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

照在你身上阳光减少，所以严格上说来你处于中，但并不像本那么黑。

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

一旦完全进入本，由于阳光通过地球大气层散射，月球呈现出暗淡红色。

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

那个被称为本，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.

随着月亮被本遮蔽得更深，月亮会呈现出红色，有时种月亮被称为血月。

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

月球，或称本，投射在地球上，任何在范围内人都能看到日食。

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

本是月食时地球和日食时月球黑暗部分。

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

在直接位于月球本或中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，本总是显得比月球大。

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

最后，月亮开始进入地球本，真正月食就开始了。