rate of diffusion 扩散速度 ; 扩散速率
Diffusion rate of gas 气体扩散速率
diffusion of rate
速率扩散
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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
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