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infiltration

noun
🔊/ˌɪnfɪlˈtreɪʃn/
🔊/ˌɪnfɪlˈtreɪʃn/
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  1. [uncountable, countable] infiltration (of somebody) (into something) the act of entering a place or an organization secretly, especially in order to get information that can be used against it（使）悄悄进入，潜入
    • the infiltration of terrorists from across the border恐怖分子的越境渗透
    Topics War and conflictc2
  2. [uncountable] infiltration (of something) (into something) the process of passing slowly into something渗入；渗透
    • the infiltration of rain into the soil雨水渗透土壤