A lunar eclipse occurs when the moon passes behind the earth, which blocks the sun's rays from striking the moon.
月食发生时，月亮从地球背后经过，这样就阻止了太阳光线照在月球上。
Methods 38 cases obtained ischemic lunar bone necrosis were analyzed and compared their X-rays.
方法分析38例已确诊的月骨缺血性坏死病例，比较各期X线片所见。
A lunar eclipse occurs when Earth lines up directly between the Sun and the Moon, blocking the Sun's rays and casting a shadow on the Moon.
月食发生是当地球位于太阳和月亮之间同一直线时，挡住太阳光而在月球投下阴影所形成的。
A lunar eclipse occurs when Earth lines up directly between the Sun and the Moon, blocking the Sun's rays and casting a shadow on the Moon.
月食发生是当地球位于太阳和月亮之间同一直线时，挡住太阳光而在月球投下阴影所形成的。
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