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春天来了,小朋友们有没有注意到小河边、池塘边多了许多小生物啊?你们知道小蝌蚪是怎样长成青蛙的吗?你们有没有想过去养几只小蝌蚪来观察它们的成长过程呢?
Did you notice that the little tadpoles grow into frogs? Did you ever want to raise several small tadpoles to observe their growth? The process?