The City of Bilbao's metro service has announced that the transportation system was powered completely by renewable sources last year, making it the first metro system in the world to do so.

毕尔巴鄂市地铁公司宣布，自去年起全市地铁系统已完全以可再生能源为动力，这是世界上第一个这样的交通系统。

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The same as other teams in the world who often need implode the game's emulator system synchronously or early, we use this way as the primary method to study decision-making system.

同世界各国大多数参赛队一样，在构造硬件环境同时，我们也进行了比赛仿真系统的开发，用系统仿真方法作为研究决策系统的主要方法。

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Making globalizing city and improving the level of urban function are important steps for the economy merging into the world economic system.

构筑国际化城市，提升城市功能级别成为我国经济融入国际经济体系的一个重要步骤。

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The strain on the world's food system is making policy makers nervous.

WSJ: Grain Prices Soar as U.S. Slashes Outlook

Android is the leading mobile operating system in the world, but making money off it is another story.

FORBES: Google's Searching For Mobile Help

We can expect to see this doctrine in full flower during the President's forays this week into Middle East peace-making, nuclear disarmament and reordering the world economic system.

CENTERFORSECURITYPOLICY: The Obama doctrine