Even in very large cities, people maintain close social ties within small, private social worlds.

即使在非常大的城市里，人们在私人的小社会世界里也保持着密切的社会联系。

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In this series, learn how virtual worlds can be applied within an enterprise to save money and time.

在本系列中，学习如何在企业中应用虚拟世界以节省资金和时间。

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This technique enabled the amassing of "virtual assets" within the game worlds, such as swords, shields and the like, without any further human involvement.

这种技术可以积累游戏世界中的“虚拟财产”，比如剑、盾之类，而无需投入更多人力。

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When you put your character on the reader, it unlocks the character in the game, and actually unlocks worlds within the game that are unique to the character.

FORBES: Bobby Kotick On Hatching Skylanders: Spyro's Adventure

Unlike Mario, which was linear, Zelda let you venture in all directions, exploring worlds within worlds, with an array of choice and depth never seen before in a video game.

NEWYORKER: Master of Play

Seth Shostak, an astronomer at the SETI Institute in California, speculated in 2011 that there could be 30, 000 habitable worlds within 1, 000 light-years of Earth, a minuscule distance by galactic standards.

ECONOMIST: Extra-terrestrial life