In spite of the fact that on the non institutional level mass media and public identity can exert some kind of check and balance, Congress can still play a controlling role.
尽管非制度层面的大众传媒和公众认知能发挥一定程度的制衡作用，但国会仍可对此加以控制。
When wolves later reached the island, naturalists widely assumed that the wolves would play a key role in controlling the moose population.
博物学家们普遍认为，当狼群之后抵达该岛时，它们将在控制驼鹿数量方面发挥关键作用。
The revelation that plant microRNAs play a role in controlling human physiology highlights the fact that our bodies are highly integrated ecosystems.
这个关于植物的MicroRNA能在控制人类生理学的过程中起作用的启示强调了我们的身体是与生态系统高度统一的事实。
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