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billionth
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第十亿的,十亿分之一的,第十亿,十亿分之一
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详细解释：
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以下为句子列表：
英文: A team from France and the Netherlands set a new speed record for subdividing the second, reporting last year that a laser strobe light had emitted pulses lasting 250 attoseconds—that's 250 billionths of a billionth of a second.
中文: 去年，法国与荷兰合组的研究团队创下新纪录，根据他们报导，一束频闪雷射光发射的脉冲，只持续了250阿秒（10-18秒）。
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英文: According to the IFED, earth has 6.477 billion human beings now, and the 6.5 billionth will be born in Asia some time in December.
中文: 根据IFED，地球现在有六十四亿七千七百万人，第六十五亿人将在十二月的某一天于亚洲出生。
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英文: At zero o'clock, January 6 this year, with the cry of a baby at the Beijing Maternity Hospital, China greeted its 1.3 billionth citizen day.
中文: 今年一月六日凌晨零点，随着北京妇产医院的一声呱呱婴啼，中国迎来了第13亿人口日。
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英文: Last but not least are frequencies around a billionth of a billionth of a Hertz.
中文: 最后一个频率范围是在几十亿分之一的几十亿之一赫兹。
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英文: Over these distances, the distortions of space are approximately a billionth the size of an atom—sufficient to cause noticeable differences in the phase of the combining light beams.
中文: 在这麽长的距离之下，即使只有十亿分之一个原子大小的空间扭曲，也足以使光束在合并时出现相位差。
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