You may have read the Power of Now, or studied the Sedona method.

你可能读过《当下的力量》这本书，也可能研究过塞多纳术。

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I have learned or studied Chinese for six months.

我在学校学了汉语六个月。

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I have learned or studied Chinese for six months at school.

我在学校学了汉语六个月。

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I have learned or studied Chinese for six months at school.

我在学校学了汉语六个月。

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