Even in these areas, the lack of infrastructure in a spread throughout the territory and it is one of the main reasons for the limited diffusion.

即使在这些地区，也到处都面临着基础设施欠缺的问题，这也是传播受限的主因之一。

youdao

Research mechanism of diffusion and infiltration of concrete, analyze the main influence factor of the concrete permeability and summarized the method of testing of the penetrating index of concrete.

研究了水、氯离子及气体在混凝土中的渗透与扩散的机理，分析了影响混凝土渗透性的主要因素及有待进一步研究的方向，并总结了混凝土渗透性指标的测试方法。

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The optimum design of Controlled Diffusion Airfoils (CDA) is one of the main research fields in subsonic and transonic profile design for multistage compressor.

可控扩散叶型（ CDA）的优化设计是目前国外对亚音、跨音速压气机叶型研究的主要内容之一。

youdao

If there's a group, responsibility to help decreases and this is captured in different ways but the main idea is we all think someone else will help so we don't. There's a diffusion.

如果是一群人，帮助的责任就会分散变小,这体现在多个方面,但最主要的想法就是我们都认为别人会帮助,所以我们就不帮助了，责任被分散了。

耶鲁公开课 - 心理学导论课程节选

His main line is sold in over 50 countries worldwide, along with his diffusion lines RC Menswear and Just Cavalli, plus a children's line, knitwear, accessories, eyewear, watches, perfumes, underwear and beachwear.

CNN: Fashion's peacock: Designer Roberto Cavalli