语音讲解：
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　　A mother mouse was out for a stroll with her babies when she spotted a cat crouched behind a bush. She watched the cat, and the cat watched the mice.

　　Mother mouse barked fiercely, "Woof, woof, woof!" The cat was so terrified that it ran for it's life.

　　Mother mouse turned to her babies and said, "Now, do you understand the value of a second language?"