wooden purlings

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• 英语翻译帮忙翻译成中文 ：（ 就写开头一点 ）One hot and sunny afternoon three boys were walking towards the river.They were going three to fish and to swim.On the way they passed by a green field.There was an old wooden fance around it.（ 就这篇课文 ,求翻译 ,知道话把全文都翻译 ,不知道就翻译我写的这些好了 ）
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