求翻译：据国外有的学者计算，上世纪５０年代以来，有１１个国家和地区在长达２５年的时间内，年均经济增速达到７％以上。而我国改革开放以来，已有２９年实现了年均增速９．８％。是什么意思？

Some foreign scholars calculated that since the 1950s, 11 countries and regions in 25 years time, the average annual economic growth rate reached more than 7%. Since China's reform and opening up, has 29 years to achieve an average annual growth rate of 9.8%.

According to some foreign scholars, the 50s, with 11 countries and regions in up to 25 hours, the average annual economic growth rate above 7 percent. And since China's reform and opening up, there are 29 FOR THE 9.8 % growth rate.

According to the scholar who overseas has calculates, since on the century 50's, some 11 countries and the area in 25 years, the yearly average economical speed-up achieves above 7%.But since our country reform and open policy, had 29 years to realize the increase per year 9.8%.

According to some scholars abroad calculations, since the 50 's of last century, with 11 countries within the time and area for over 25 years, average annual economic growth rate to more than 7%. Since the beginning of reform and opening up in China, has had 29 years to achieve an average annual gro

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