躲猫猫游戏风行世界各地，跨越语言和文化障碍，为何它如此普遍？也许因为它是一种强大的学习工具。

Peekaboo is a game played over the world, crossing language and cultural barriers. Why is it so universal? Perhaps because it's such a powerful learning tool.

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在双足机器人跨越动态障碍物的在线控制问题中，脚步规划和步态控制的学习时间是关键问题。

In the question of on-line control for biped robot to step over dynamic obstacle, the learning time of footstep planning and gait pattern training is a crucial problem.

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