Frogs have different life cycles. Frogs are born in eggs. When they hatch, they are called tadpoles. Tadpoles have long tails and no legs. They use gills to breathe in the water. Soon, they grow legs and start to use lungs to breathe.
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Lung 不是应该读成Λ?
Ko姐 回复 @姚卉林Fay: 对的。