这是一个不可思议的挑战，也是我非常期待的。

It is an incredible challenge and one I am looking forward to very much.

youdao

因为我们知道人类能做什么，不能做什么，也知道人类的构造是怎样的，人类身体的极限在哪里，所以，这些图像的确是对人智力的挑战，它们会让人产生不可思议的幻觉。

We all know what people can and can't do, how they are built, what the limits of the human body are, yet some images challenge the brain and create illusions.

youdao

因此，对于人脑这样一件不可思议的艺术品，每天对他来一点简单的小挑战可以让他保持新鲜感和充满活力。

The human brain is an incredible work of art and providing it with simple challenges will keep it fresh and alive.

youdao