从沉降、稳定、渗透、扩散四个方面分析了在城市固体废弃物填埋场中存在的问题。
The existing problems of landfills in various aspects including settlement, stability, seepage, diffusion are discussed in this paper.
它可以减少液体、固体和气体界面间的表面或界面张力，容易在水或其他液体中混合或扩散，因而广泛应用于环境保护等领域。
It can reduce the surface tension between liquid, solid or gas. Because of being mixed or diffused easily in liquid, it has been widely used in environmental protection.
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