In theoretically, the hot spot model of plasma ignition is studied, it can describe the ignition behaviors at a qualitative level and analyze all sots of effects.

理论上，研究了等离子体“过热点”点火理论模型，可以对等离子体点火过程进行定性地描述，分析点火过程中的各种效应。

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Radio companies needed to diversify their revenue model away from a reliance on spot advertising, he said.

“广播公司需要多样化的收入模式，而不应该像现在这样依赖现时广告，”他说。

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Xfire’s premium exit valuation can be partially justified by the fact that Xfire had “de-risked” the business model by demonstrating that advertisers would pay a meaningful CPM for a unique ad spot.

广告商将会为一个独有的广告位置付一个有意义的CPM（千人成本），从而去掉了Xfire商业模型的风险，这一状况也部分地解释了为什么Xfire有很高的估值溢价。

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The GoDaddy.com spot, which showed a super model locking lips with a geek named Walter, was polarizing but generated plenty of laughs.

WSJ: Chrysler, Taco Bell Win in Ad Bowl

Dr Kealy's model, by contrast, is spot-on.

ECONOMIST: Mathematical ecology

It takes a lot of practice to fly model planes precisely, and even experts might have difficulty in hitting a vulnerable spot such as a window.

FORBES: Even With Explosives, Model Planes Just Aren't That Dangerous