2000年到2008年，用购买力平价计，非洲年产出增长4.9%，是上世纪八、九十年代的两倍，也高于全球平均水平3.8%。
In 2000-08 Africa's annual output grew by 4.9% (adjusted for purchasing-power parity), twice as fast as in the 1980s and 1990s and faster than the global average of 3.8%.
Twitter没有公布过自己的用户数或流量，但在八月份的时候，其共同创始人Biz Stone曾告诉我，Twitter的服务在“过去10个月里，增长了六倍。
Twitter doesn't release its own user or traffic figures, but co-founder Biz Stone told me in August that the servicehad"grown six times over in the last 10 months.
申请硕士和博士等高学位的留学生数量剧增，自上世纪九十年代中期以来增长了八倍多。
The number of overseas students taking higher degree courses, such as masters and doctorates, has soared - rising more than eightfold since the mid-1990s.
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