问题描述：
请你写出动物短语的意思.
kill two birds with one stone.
as quiet as a mouse.
raining cats and dogs.
a wolf in sheep"s clothing.
ugly duckling has grown into a swan.
kill two birds with one stone.
as quiet as a mouse.
raining cats and dogs.
a wolf in sheep"s clothing.
ugly duckling has grown into a swan.
问题解答：
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