我认为这水是我的，它就是我的，用英语怎么说我18岁，没念过书，正在自学英语，练习翻译。这句话不会翻译，请知道的告诉我准确的翻译好吗。

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I think the water is mine , it just mine .
I suppose the water is mine,so it is.
I think this is my water, it's mine