About this episode
春天的清晨，我们常常能在草地上看到一团一团的小土堆，那是蚯蚓拉的便便。蚯蚓在泥土里生活，一边吃进泥土，一边拉出土粪。它们没有手脚，全靠身体一拱一拱地在泥土中钻来钻去。它们的身体很奇特，哪怕断掉一截，也能长出新的来。蚯蚓是农田里的好农夫，它能帮助农作物松土，它的便便能吸收大量水分。
本书介绍蚯蚓的身体特征、生活习性以及对植物生长的帮助。
本书介绍蚯蚓的身体特征、生活习性以及对植物生长的帮助。
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