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A total solar eclipse happens when the Moon passes between the Sun and the Earth as they align, blocking the face of the Sun.
当月球运动到太阳和地球之间时，就会发生日全食，三者处在一条直线，太阳会被挡住。
Total solar eclipses occur once every 1 to 2 years.
日全食每1至2年发生一次。
So where can you see it this year?
那么今年你能在哪里观测日全食呢？
The full eclipse will happen across North America, passing over Mexico, the United States and Canada.
这次日全食将出现在北美，沿途经过墨西哥、美国和加拿大。
If you're in the UK though, don't be disappointed, because some of us can still see the partial solar eclipse.
如果你在英国，不要失望，因为我们中的一些人仍然可以看到日偏食。
Look out for it just before the sun sets at around 8:00 P.M.
在太阳下山之前，也就是晚上8点左右，可以留意下。
But of course the weather will play a part, so keep your eye on the latest forecast.
当然天气也会有影响，所以请关注最新的天气预报。
How can we view it safely?
我们怎样才能安全地观测呢？
Well, you can't look directly at any phase of a solar eclipse, because it'll damage your eyes.
日食的任何阶段你都不能直视它，因为这会损害你的眼睛。
But you can view it with protective eyewear, like eclipse glasses or a handheld solar viewer.
但你可以戴上防护眼镜，比如日食眼镜或手持式太阳观测器。
And you can even make your own at home.
你甚至可以在家里自己做一个。
