中间是一层半湿的沙子，可以堆起一个个沙子人。

Middle is a layer of half wet sand, can one man and sand.

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人：可怜的驴子！平常的棉花是轻的。可是湿棉花就很重！

Man: Poor Donkey! Plain cotton is light. But wet cotton is very heavy.

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约1.7亿人在美国和其他发达国家数百万更多的有湿性amd。

Approximately 1.7 million people in the U. S. and millions more in other developed countries have wet AMD.

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约1.7亿人在美国和其他发达国家数百万更多的有湿性amd。

Approximately 1.7 million people in the U. S. and millions more in other developed countries have wet AMD.

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