首先，我们有个小花园！这是马德兰先生许给我的。

We shall have a little garden the very first thing; M. Madeleine has promised it to me.

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希腊神话中，许德拉是一头九首怪物，它的头如果被砍，马上就会长回；其实在某些故事版本中，会很快长出两个头。

IN GREEK legend, the hydra was a many-headed monster. If a head was severed, it grew back.

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麻省理工的视觉科学家奥德·奥利瓦和格拉斯哥大学的研究员菲利普·许恩斯将两幅图像混合生成了上面这一组错觉图片。左边是狂暴博士，右边的是镇静先生。

MIT vision scientist Aude Oliva and University of Glasgow researcher Philippe Schyns created this illusion by producing hybrids of two images.

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