If you master the basic ways of designing toys and have certain analytic abilities, you can design more toy robots with more fun and more functions.

只有懂得玩具机器人行走机构的基本设计方法，且具有一定的分析能力，才能设计出更多更好、且具有更多功能的玩具机器人。

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In this paper we introduce certain class of analytic functions defined in the open unit disc.

本文引入了某族定义在单位圆内的解析函数。

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