As is known to all, using clean energy plays an important role in pollution reduction.

众所周知，使用清洁能源在减少污染方面发挥着重要作用。

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Still, exercise's supporting role in weight reduction is vital.

然而，运动在减肥中的辅助作用是至关重要的。

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So why isn't someone offering a proposal reflecting the reality that the Bush tax cuts were a huge mistake, and suggesting that increased revenue play a major role in deficit reduction?

那么，为什么没有人提出一个方案声明布什的减税政策是一种巨大的错误，并说明增加收益将在降低赤字方面发挥重要的作用？

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Sadly, the council has been compliant and played their role in the reduction of crucial services, imposing a council tax freeze for a fourth year instead trying to maintain the once 'excellent' rated services it provided.

BBC: Somerset County Council: Union fear over job cuts plans

As the number two Republican in the Senate, he made the tough choices necessary to close deficits and he played an important role in bipartisan deficit reduction agreements.

WHITEHOUSE: Encouraging Long-Term Fiscal Responsibility and Reform

The WHO will set up a high-level group of external advisors on the role of health in poverty reduction.

BBC: WHO launches anti-poverty drive