Software has become a key source of new computer products and services.

软件已成为新兴电脑产品和服务的关键资源。

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Software has become a key source of new consumer products and services.

软件成为新的消费类产品和服务的核心来源。

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Cheyenne's small size may help; fewer cars travel the roads, and vehicles are a key source of PM 2.5 (and ozone).

夏延城市面积小也有帮助；路上来往的车辆更少，机动车是PM2.5的主要来源。

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Another source of concern: the discovery of 20 tar balls off Key West,Florida on Monday.

VOA: standard.2010.05.18

Accordingly, divestment campaign architects correctly identified publicly-traded companies as the key source of leverage.

CENTERFORSECURITYPOLICY: The South Africa Model

It said the state-run oil firm was hit because it was a key source of income for the government.

BBC: Saudi Aramco oil giant recovers from virus attack

The extent to which private-sector involvement can be smoothly and successfully implemented also remains a key source of uncertainty.

FORBES: Outlook For A Weaker Euro As Concern Moves Toward Rome