看起来是这样的——毕竟，2012年是一个转折点，超过一半的美国人开始拥有智能手机。
It looks like it—after all, 2012 was the tipping point when more than half of Americans began owning smartphones.
这本书还说，不久的将来，我们几乎一半的工作都会由人工智能来完成。
This book also says almost half of our jobs will be done by AI technologies in the near future.
据一些人估计，四年内，卖出去的所有手机将有一半是“智能的”，而到2015年，则几乎全是。
By some estimates, half of all handsets sold will be "smart" in four years and by 2015 almost all will be.
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