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.

• 事实上，科学家已经掌握了评估生物控制 欧洲蕨造成的影响所需要的大量资料，但这些资料分散在许多个人、组织和政府部门手中。