Two years age Africa lost more than half its cassava crop — a key source of calories — to the Mosaic virus.

两年前，花叶病毒使非洲损失了超过一半的木薯，而这种作物是当地人的主要食物。

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Two years age, Africa lost more than half its cassava crop — a key source of calories — to the Mosaic virus.

两年前，花叶病毒使非洲损失了超过一半的木薯，而这种作物是当地人的主要食物。

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Current approaches aren't working; even though home users and many companies started filtering their email two years age, the overall amount of junk mail has ballooned exponentially.

目前采用的方法都不可行。虽然两年前家庭用户以及许多公司用户都已开始使用邮件过滤功能，但垃圾邮件的总量还是呈几何指数增长。

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In nineteen eighty-three, he began to study more than twenty-two thousand healthy male doctors over forty years of age.

VOA: special.2009.10.20

Around seven years of age going up through puberty, the ability to learn language starts to go away.

大约七岁的时候开始,一直到青春期,学习语言的能力逐渐减弱

耶鲁公开课 - 心理学导论课程节选

Now at the outbreak of the Peloponnesian War Socrates was just under 40 years of age.

伯罗奔尼撒战争爆发时,苏格拉底才快要接近40岁。

耶鲁公开课 - 政治哲学导论课程节选

The law in Bangladesh says no girl should get married before 18 years of age and no boy before 21 years of age.

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It has since been ascertained, beyond a doubt, that the murderer of the unfortunate gentleman is no other than his third son, Richard Dadd, a fine young man, 24 years age, and that he committed the act whilst labouring under an aberration of intellect.

ECONOMIST: Dreadful murder | The

For the nasal spray form of the vaccine, there is evidence of high protection for children aged 6 months to 7 years, inconsistent evidence of protection in adults 60 years of age and older, and a lack of evidence of protection in individuals between 8 and 59 years of age, the study says.

CNN: Flu vaccine attitudes abroad differ from U.S.