求翻译：求翻译：we can see a river in it ,there are two boats on the river,in one boat there is a boy .in the other are two girls .there\'s a house near the river .near the house there is a big tree .in the tree there are some birds .oh, there are seven .under the tree, there is a cat and a dog .in the river there are a lot of fis是什么意思？

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