事实上，科学家已经掌握了评估生物控制蕨类植物的影响所需要的大量信息，但是这些信息在许多个人、组织和政府机构中传播开来。

In fact, scientists already have much of the information needed to assess the impact of biological control of bracken, but it is spread among many individuals, organizations, and government bodies.

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大规模传播的新技术以前所未有的速度和效率影响到大量的人，但是它却将信息流动的控制权交给少数被选拨出来的人手里。

The new technologies of mass dissemination could reach large numbers of people with unprecedented speed and efficiency, but put control of the flow of information into the hands of a select few.

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疾病控制及预防中心网站CDC . gov提供有关防止家里细菌传播，如何正确洗手，流感疫苗的重要性和其他防病的免疫措施等信息。

The CDC.gov Web site offers information on keeping germs at bay in the home, how to wash your hands correctly, and the importance of flu vaccines and other immunizations in preventing disease.

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