The retail industry is a key sector of Singapore's vibrant economy.

零售业是新加坡生气勃勃的经济中的重要一环。

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In developed countries, cluster economy, based on the industry cluster, has become the key sector and light spot of regional economy for a long time.

在发达国家，基于产业集群而形成的集群经济早已成为区域经济的重要板块和亮点。

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The auto industry is important and a key sector of the machinery industry in Sichuan.

汽车制造在四川处于重要的地位，是机械产业重要的领域。

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Tolbert says employment is the key in a nation still recovering from conflict where the United Nations estimates formal sector unemployment at 80 percent.

VOA: standard.2009.09.13

The Cypriots argue that the bailout would end up undermining a key sector of the economy.

BBC: Cyprus bailout: Who messed up?

The auto industry, another key sector, has also been turning in results that have been mixed at best.

FORBES: Lujiazui Breakfast: News And Views About China Stocks -- Aug. 29

It has helped restore a key sector of the American manufacturing economy.

WHITEHOUSE: Press Briefing