play a key role in 起关键作用 ; 在某方面起重要作用
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。
With so much at stake, the Inuit are determined to play a key role in teasing out the mysteries of climate change in the Arctic.
面临如此多的危险，因纽特人决心在揭开北极气候变化之谜方面发挥关键作用。
Tensions grounded in financial problems often play a key role in ending a marriage.
以经济问题为基础的紧张关系，往往是婚姻破裂的关键因素。
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