Bilingual speakers often do better than monolinguals in completing certain tasks because they can concentrate better on what they are doing.

由于双语者能更好地专注于他们正在做的事情，所以他们通常比单语者在完成某些任务时做得更好。

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Try to plan your day in advance. By doing this, you will avoid unnecessary time consuming activities and concentrate on important things.

尝试提前做日计划，你将能避免浪费时间，并把精力集中在重要的事情上。

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In doing so, businesses will be able to concentrate on what they know how do best: their business.

这样，事情将能够集中在他们知道如何做得最好的事情上：他们的业务。

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These three sentences do nothing less than blow apart the central tenet of modern conservative economic theory, confirming that lowering tax rates on the wealthy does nothing to grow the economy while doing a great deal to concentrate more wealth in the pockets of those at the very top of the income chain.

FORBES: Non-Partisan Congressional Tax Report Debunks Core Conservative Economic Theory-GOP Suppresses Study

They can run Northern Ireland very well and now that's what they ought to concentrate on doing and not continuing to squabble over things that really ought to be in the past.

BBC: News | BREAKFAST WITH FROST | Senator George Mitchell