diffusion theory的用法和樣例：
例句
- Many of the above-mentioned trends can be rationalized in terms of quasi-steady diffusion theory.
上述的許多問題可用准穩態擴散理論加以推理。 - According to the need for study on methane movement law in fully mechanizedsublevl caving stopes,the methane rising and pressure diffusion theory is put forward.
依研究綜放采場瓦斯運移規律的需要，提出礦井瓦斯氣體浮升與壓強擴散理論。
