The Billiard-Ball Model has been used to discuss the formation of Two-photon Tri-level Echo.

本文用弹球模型讨论了双光子三能级光子回波的形成。

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The paper makes an analysis of the results of wind Tunnel tests on the ball model with hollow base.

本文给出了底凹弹丸模型风洞实验结果的分析。

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Based on a completely inelastic bouncing ball model, a possible explanation for the bifurcation phenomena is presented.

采用完全非弹性蹦球模型分析了颗粒对容器底的冲击力，并给出了倍周期分岔现象的一种解释。

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The small-ball model that has given Relativity its success.

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The internet had taken a wrecking ball to his business model.

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So, Dr Wang concludes, it looks as though the ball-and-chain model is wrong and the rod model is right.

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