This is an apple tree .主语+系动词+表语 Father returned home yesterday.主语+不及物动词 Teachers take good care of us student .
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this is an apple tree
这是一棵苹果树
以上为机器翻译结果，长、整句建议使用 人工翻译 。
This is an apple tree.
这是一棵苹果树。
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This is an apple tree, and those is an orange tree.
这是一棵苹果树，那是一棵桔子枉。
He knows this is an apple tree, but also to determine his "Entomogenous goal" is to find a Big apple.
他知道这是一棵苹果树，也确定他的“虫生目标”就是找到一棵大苹果。
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