Kevin Balke, a research engineer at the Texas A&M University Transportation Institute, says that while smart lights can be particularly beneficial for some cities, others are so jammed that only a sharp reduction in the number of cars on the road will make a meaningful difference.

德克萨斯农工大学交通研究所的研究工程师凯文·鲍克说，虽然智能交通灯对一些城市特别有帮助，但有些城市太拥挤了，只有大幅减少道路上的汽车数量才能有效改变拥堵的局面。

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Looking ahead, prospects are for a sharp reduction in export growth.

前景是出口增长的巨额下降。

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Due to the sharp reduction of the number of the element, the time needed for processing this problem is much less.

由于计算所需要的单元数减少，处理该问题所需要的时间也明显减少。

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It's not only Scotland that's seen a sharp reduction in the number of listed companies with headquarters.

BBC: Is London good or bad for Scotland?

The sharp reduction in congestion in central London following the introduction of the congestion charge in February strengthens this case.

ECONOMIST: Labour's transport U-turn

Good behavior rules and jail overcrowding guidelines add up to a sharp reduction in actual time served for county inmates, Whitmore said.

CNN: Bobby Brown goes to jail