几年前，物理学家认识到，异向介质也可以模拟天文现象，如行星绕恒星，光线被黑洞捕获等。

A few years ago, physicists know that different to medium can also simulated astronomical phenomena, such as planets orbiting stars, light is black holes capture, etc.

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本书为你展示了如何认识对象的形体，光线和阴影，通过对透视的认知使你的画作更为真实。

This book shows you how to consider the shape of an object, render light and shadow, and make your drawings more realistic by understanding perspective.

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