因为我们可以精诚合作，我们就可以制作复杂的机器，建立整个城市-需要大量合作的社区。

Because we can cooperate, we can build sophisticated machines and create whole cities - communities that require huge amounts of coordination.

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几十个研究人员坐在一排排的桌子前，而在繁忙的制图室里，设计人员坐在高高的凳子上，对着绘图板，制作复杂精美的报告和图表。

There were dozens of researchers seated in rows of desks and a bustling chart room where designers, perched on high stools at drafting tables, created elaborate presentations and charts.

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中国人在新石器时代就已经开始制作复杂的陶瓷，并在公元7世纪开始制作瓷器。

The Chinese began their sophisticated production of pottery in the Neolithic period and produced porcelain as early as the 7th century AD.

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