在过去一个世纪，这个球已经更换迭代七次。

Over the past century, there have been seven iterations of this ball.

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上世纪40年代末，巴基提出了一个解决方法，即球型屋顶，这也是他最著名的发明。

Dome, the invention he is most famous for. The geodesic.

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他说，二十世纪初以来，美国一直是全 球最大的整体能源消费国。

The U.S. had been the biggest overall energy consumer since the early 1900s, he said.

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他说，二十世纪初以来，美国一直是全 球最大的整体能源消费国。

The U.S. had been the biggest overall energy consumer since the early 1900s, he said.

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