China has made major breakthroughs in oil and gas exploration of lake basin area in the past five decades.

过去的半个世纪中国油气勘探在被世界公认“贫油”的陆相湖盆创造了奇迹。

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There has been a rapid increase (greater than 10-fold) in type 1 diabetes in European countries in the past few decades, especially in children under five years.

过去数十年来糖尿病患者在欧洲国家迅速增加(超过10倍)，特别是5岁以下的儿童。

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Humanity's greatest accomplishment of the past five decades, declared Bill Gates this week, is the reduction in the number of deaths among young children by half, to 10m a year in 2007.

本周，比尔·盖茨宣布，2007年全球儿童死亡人数为1000万人，较半个世纪前减少了一半，这不愧为人类在过去50年当中所取得的最伟大的成就。

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In the past five decades, for example, the difference between winter and summer returns is higher than the historical one.

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The Beechcraft King Air first took to the skies in 1964, and for the past five decades it has continued to dominate the market, outselling all of its turboprop competitors combined.

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Prices at the high end have doubled in the last five years and soared fortyfold in the past three decades.

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