问题描述：
求这英文首诗的中文含义
Four ducks on a pond
A grass bark beyond
A blue sky of spring
White clouds on the wing
What a little thing
To remember for years
To remember with tears
Four ducks on a pond
A grass bark beyond
A blue sky of spring
White clouds on the wing
What a little thing
To remember for years
To remember with tears
问题解答：
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