The stone circle is said to date back to 3200 BC and is a vision in itself.

它可以追溯到公元前3200年，是一处很独特的景点。

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Circle recognition and ascertaining its parameters is an important task in computer vision and pattern recognition.

图像处理中圆的检测及其参数确定是计算机视觉和模式识别中的一项重要任务。

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This contact would give the girl a vision of her future self. It would, Coyle emphasizes, give her a glimpse of an enchanted circle she might someday join.

这种接触会带给这个女孩对她未来自己的幻象，Coyle强调说，这会给她对某一天她也许会加入的一个充满魅力的社交圈的一个印象。

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"Ali has been instrumental in forming the entrepreneurial vision and early development of the company, " Michael Kirkwood, chairman of Circle Holdings, said in a statement.

BBC: Hinchingbrooke: Ali Parsa steps down as chief executive