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蚯蚓在自然界中分布非常广泛,是一种常见的动物,为了比较全面地了解它,我们在老师的指导下,进行了一次探索蚯蚓秘密的活动。
Earthworm is widely distributed in nature, is a common animal, in order to more fully understand it, we under the guidance of a teacher, to explore the activities of earthworm secrets.