If the moon goes between the Earth and the sun, we have an eclipse of the sun.
如果月球在地球和太阳之间，那么我们就有(叫)日食。
An eclipse of the sun occurs when the moon passes directly between the sun and the earth, screening part or all of the sun's disk.
当月亮直接从太阳和地球之间经过，遮住太阳一部分或全部时，日食便发生了。
During an eclipse, the sun, Earth and moon line up, leaving a darkened moon visible to observers on the night side of the planet.
月全市发生时，太阳，地球和月球连成一线，地球夜晚一侧的观察者可以看到一个变暗了的月亮。
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