permeability
noun [ U ] formal uk/ˌpɜː.mi.əˈbɪl.ə.ti/ us/ˌpɝː.mi.əˈbɪl.ə.t̬i/
渗透性
the ability of a substance to allow gases or liquids to go through it
Chalk has a high permeability (= liquids easily pass through it). 粉笔的渗透性很强。
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