虽然月球背面经常被认为是月球暗面，但事实上月球背面的阳光照射同月球正面一样多。
Although it is often regarded as the dark side of the moon, the far side actually gets as much sunshine as the near side.
数十年来科学家们一直试图想搞清为何月球正面布满环形山而背面的山高过3千米。
For decades scientists have been trying to understand why the visible near side of the Moon is covered in craters while the far side has mountain ranges higher than 3, 000 metres.
在月球几乎直接从地球正面或背面穿过这种甚为罕见的情况下，就会发生食。
It is a rare occasion when the moon does pass more or less directly before or behind the earth, an eclipse occurs.
在月球几乎直接从地球正面或背面穿过这种甚为罕见的情况下，就会发生食。
It is a rare occasion when the moon does pass more or less directly before or behind the earth, an eclipse occurs.
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