Bojowald found he had to create a new mathematical model to use with the theory of Loop Quantum Gravity in order to explore the universe before the Big Bounce with more precision.

波究瓦德发现他必须创建一个新的数学模式来使用循环量子引力理论，以便更加精确地探究大弹跳之前的宇宙。

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In the toy model, the equivalent of time travel would be for a plasmons to complete a loop that runs along the exact same path it had previously traveled.

在模拟模型中，代表时间旅行的将会是等离子体激元在它们之前走过的路径上完成一个环。

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In previous versions of WebSphere process Server, you can explicitly model the parallel approvals in your process, or use a loop for multiple iterations.

在WebSphere Process Server以前的版本中，可以在过程中显式地建模并行批准，或者使用包含多个迭代的循环。

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American Express says it is uniquely positioned to offer the service thanks to its "closed-loop" business model in which it acts as card issuer, merchant acquirer and payment processing operator.

BBC: Foursquare and Amex join forces in UK to offer discounts

The gravity-based system responded as it was designed to, circulating water and steam in a continuous loop to keep the scale-model reactor at a safe temperature automatically.

CNN: Today/Tomorrow - Helping nuclear plants keep their cool

There are many areas of overlap between biomimicry and "cradle-to-cradle" particularly in the way that ecosystems present a great model of closed loop systems in which any waste from one organism becomes the nutrient for something else.

CNN: STORY HIGHLIGHTS