This paper is based on the theory of gas dynamics, by means of improving the first nozzle of diffusion pump in order to increase the pumping speed of diffusion pump are reported in the paper.

本文以气体动力学理论为基础，论述了如何通过改进扩散泵的第一级喷咀来提高扩散泵的抽气速率。

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Thompson used diffusion imaging, which measures the direction in which water diffuses through white matter, to show the speed of the connections.

汤普森利用扩散方法成像，他控制水通过白质扩散的方向，显示大脑连接的速度。

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The calculation accuracy of diffusion speed in whole-space electromagnetic field affects directly the interpretative precision of TEM survey in underground coal mines.

全空间电磁场扩散速度计算的准确性，直接影响矿井瞬变电磁法探测结果的精度。

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The marketing campaign should add emotion and hype to the controversy surrounding the product to speed up the spread and the diffusion of the message to a critical mass of consumers.

FORBES: What Makes A Product Cool?