在过去的四年半时间里，我们已经看到美国企业创造超过10万个新的就业机会。

Over the past four and a half years, we have seen American businesses create more than 10 million new jobs.

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纽约艾尔·伯特·爱因斯坦医学院(albert EinsteinCollegeof Medicine)的研究人员在四年半时间里跟踪调查了500名以上老年男性和女性的健康状况。

Researchers from the Albert Einstein College of Medicine in New York tracked the health of more than 500 elderly men and women for four-and-a-half years.

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过去三年半时间我都在瞪着，写满方程序的板子上。在那之前我花了四年时间写论文。

I've spent the past three and a half years staring at grease boards full of equations. Before that, I spent four years working on my thesis.

youdao

过去三年半时间我都在瞪着，写满方程序的板子上。在那之前我花了四年时间写论文。

I've spent the past three and a half years staring at grease boards full of equations. Before that, I spent four years working on my thesis.

youdao