英语翻译
原文：
在庆祝贵校100年所取得的业绩之时,我们也应该庆祝中国在过去20年中所取得的巨大成就：2亿人口摆脱贫穷；人均年经济增长率平均达到7%~8%；人均寿命提高了10岁.
我翻译的：
At the celebration for your school's 100 years old,we should also celebrate the harvest that China earned past 20 years:200 million people got rid of poverty; yearly economic growth rate reached 7%~8%; person's average lifetime rose 10 years.
主要是时态我搞不清楚