Viewing a "walkabout" simulation of Paris, subjects were exposed to billboards for films including Ice Age 2 and in Her Shoes during their virtual strolling.

看看这个在巴黎街头的模拟测试：受测试人在街头闲逛时看到一些电影的宣传片如ice Age 2和In Her Shoes。

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They started off with more than 1, 000 virtual Moon-sized objects made of rock and ice and simulated about 200 million years of planetary evolution.

BBC: NEWS | Science/Nature | Earth-like planets may be common