亲爱的小读者:自诞生以来,月亮一直默默地守护着地球,它见证了地球生命的衍变。5.2亿年前,在月球和太阳的引力下产生的潮汐带着植物来到陆地,第一批植食性的节肢动物也随之而来,后来,它们成了地球的主人。过了很长很长时间,人类才第一次仔细地观察月亮的变化。4 000多年前,生活在美 Dear Little Reader: Since birth, the moon has been silently guarding the Earth, it witnessed the evolution of life on Earth. 520 million years ago, the tides produced by the gravitation of the moon and the sun brought plants to land. The first batch of herbivorous arthropods also came along, and later they became the masters of the earth. After a long, long time, human beings first carefully observed the changes in the moon. 4 000 years ago, living in the United States