上周，科学家们警告说，世界上三分之一的北极熊可能会在未来40年里消失。

Last week the scientists warned that a third of the world's polar bears could disappear in the next 40 years.

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对世界上三分之一的人口来说，墙的倒落可能只是历史而非真实生活。

For about a third of the world's population, the fall of the wall is probably history, not real life.

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东亚显然是一个很广袤的区域，这里拥有世界上三分之一的人口和多种多样的文化。

East Asia, of course, is a huge region, home to a third of the world's population and many very different cultures.

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Daily Show I think. Additional third this year did it because Tal was on the Jon Stewart Daily Show.

我想，今年还有三分之一的人选这门课是因为Tal上了Jon，Stewart的。

哈佛公开课 - 幸福课课程节选