But he thinks other pitcher plant processes - predator-prey interactions, mutually beneficial species, the effects of disturbance - are found across ecosystems.

不过，他认为，可以确定猪笼草的其它进程——捕食者-猎物互动、物种互利、骚动的影响——超越了生态系统。

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An unarmed Predator drone has flown over the BP plant to gather intelligence on the site, a U.S. official said Thursday.

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