Using a method popularised by Jeffrey Frankel of Harvard University and Shang-Jin Wei of Columbia, they looked at the fluctuations of Asian currencies against the Swiss franc.

利用哈佛大学的杰弗里·弗兰克和哥伦比亚大学的魏尚进所普及的一种方法，他们研究了亚洲货币对瑞士法郎的波动情况。

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When I started to go to primary school, my teacher, Mr. Wei told me the importance of smiling.

当我开始上小学的时候，我的老师魏先生告诉了我微笑的重要性。

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His injury leaves his main rival, two-time world champion Yang Wei of China, as hot favourite to win gold.

BBC: Injured Hamm forced to withdraw

His opponent in the final on Sunday will be Chinese top seed Lin Dan who squeezed past world number two Lee Chong Wei of Malaysia 15-9 10-15 17-14.

BBC: SPORT | Other Sport... | Badminton | Robertson & Emms march into final

Lord Wei of Shoreditch, who resigned from his government job in May 2011, is launching the idea as a way of helping people to cope with a big change in their life, as well as society and the economy.

BBC: Big Society guru urges newly retired people to volunteer