去年四月初,我们学习了《动物与环境》一课后,我懂得了蚯蚓喜欢生活在黑暗、潮湿的环境里。老师还向我们介绍了蚯蚓是一种对人类有益的动物,它经常在土壤里活动,可以使土壤疏松,它的粪便含有很多的有机物质,是植物生长的上等肥料。我想,蚯蚓对我们人类有这么大的好处,何不就在地里人工饲养繁殖蚯蚓呢? In early April last year, after learning a lesson about Animals and the Environment, I learned that earthworms like to live in a dark, humid environment. The teacher also told us that earthworms are a kind of animal that is beneficial to human beings. They often move around in the soil to loosen the soil. Its excrement contains a lot of organic matter and is a superior fertilizer for plant growth. I think, earthworms have such a big advantage to our humanity, why not artificial breeding earthworms in the ground?