Dr Claude Sirlin: For simplicity normal tissues have relatively unrestricted water diffusion whereas water molecules in tumors are more restricted.

Claude Sirlin博士：正常组织的水分子弥散相对不受限制，而肿瘤组织的水分子弥散受到较大限制。

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Comparison of the calculation results shows that it is more rational using the mixing zone depth to control the cooling water diffusion for deeper water.

在对计算结果比较后认为，当水深较大时，采用掺混层的厚度控制温排水扩散更为合理。

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This paper studies on the mechanism of water diffusion for recycled concrete in drying environment, and establishes corresponding model of water diffusion.

对再生混凝土处在干燥环境中的水分扩散机理进行了研究，并建立了相应的水分扩散模型。

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The density of water molecules within the leaf is typically 60 times greater than the density of carbon dioxide in the air, and the diffusion rate of the water molecule is greater than that of the carbon-dioxide molecule.

WSJ: Harrison H. Schmitt and William Happer: In Defense of Carbon Dioxide