per·me·ation /ˌpɝmiˈeʃən/
  浸透,透過,普及
  per·me·ation /ˌpɝmɪˈeʃən/ 名詞
  滲透,透過
  Per·me·a·tion n. The act of permeating, passing through, or spreading throughout, the pores or interstices of any substance.
     Here is not a mere involution only, but a spiritual permeation and inexistence.   --Bp. Hall.
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  permeation
       n 1: the process of permeating or infusing something with a
            substance [syn: pervasion, suffusion]
       2: mutual penetration; diffusion of each through the other
          [syn: interpenetration]