After another failed summit, seven years of trade talks may become nine or ten.
又一次峰会无果而终,七年的贸易谈判可能变成九年或者十年。
With the world's population growing to nine billion by 2050, the Britain's former deputy PM predicts far more crucial and complex talks in Copenhagen than in Kyoto.
2050年,世界人口将增至90亿。英国前副首相预计哥本哈根谈判将比京都的重要和复杂得多。
He describes how he became a mathematician, and talks about the challenge of interesting his nine-year-old son in the beauties of mathematics.
他讲述了他是如何成为一个数学家的,也谈到激发他九岁儿子对数学中的美的兴趣时遇到的挑战。
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