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Last month the Washington University surgeons drilled a small burr hole, about the diameter of a pencil, into the patient's skull.

上个月华盛顿大学的外科医生用钻孔器在这个病人的头骨上钻了一个洞，直径大约和铅笔一样。

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However, even slight changes in the meteorology of the region this month could affect the rate of depletion of ozone and how large an area the ozone hole might span.

即使这一地区在本月之内出现任何的天气变化都有可能影响臭氧含量的变动，并决定臭氧空洞将扩大多少。

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Mr Mishkin returned to the theme at Jackson Hole last month, echoing Mr Greenspan's eventual line.

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She is holding her son, an 18-month-old boy with a hole in his heart.

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Mr. Cook said the cash pile "isn't burning a hole in our pocket" and the company has made an acquisition about every other month for the past three years.

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