Jane always goes to school early. She likes to talk to her friends before class. After school she does not go home early. She is always late. Jane stops to see the animals in the pet shop. She likes to see the dogs. One of them is a little dog. She watches the little white dog play in the window of the shop. She watches for a long time, so she comes home late.

    One day her father and mother ask why she is late, and she tells them about the little dog in the pet shop.

    Jane is not late the next day. She stops to look in the window of the shop. But she doesn't see the little white dog, and she is very sad. She is also very happy, today is her birthday.

    Mother shows her a big birthday cake and Father gives her a birthday surprise. He gives the little white dog from the shop. Jane is very happy. The next day Jane does not come home late. She runs home to play with the white dog.

“蚁穴溃堤”这一成语主要揭示了生物对环境造成的影响。