As concerns demand: the world's population is set to increase from six to nine billion in 2050.

需求方面：世界人口将从60亿增加到2050年的90亿。

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Recent figures showed job creation at a standstill, as concerns grow over the possibility of a second recession.

最近的数据显示，由于担心经济可能陷入二次衰退，美国经济创造就业的步伐停滞不前。

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The report comes as concerns are growing about state-sponsored hacking and threats to critical infrastructure.

该报告的面世，使人们越来越多地关注到，国家资助的黑客组织对关键基础设施的威胁。

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Their concerns about profits are like the ones voiced as the Internet began to change the music industry.

VOA: special.2009.07.24

They note concerns that wild plants could, as a result,gain genetically engineered resistances.

VOA: special.2009.10.27

But the president also faces growing concerns from liberal Democrats about what they see as a deepening involvement in Afghanistan.

VOA: standard.2009.09.28

These groups should give themselves a pat on the back as concerns the Jewish vote.

FORBES: Would Gazan Rockets Have Rocked American Jewish Vote?

As concerns about the batteries have increased, the FAA has conducted extensive testing of their performance.

WSJ: Dreamliner-Like Batteries Raised Concerns

U.S. stocks fell as concerns about China's economic growth gave pause to a rally.

WSJ: What's News