infiltration

• 指秘密渗透或潜入某个地区、组织或系统的过程，也指液体逐渐渗过多孔材料的过程。

A noun referring to the process of secretly entering or gaining access to an area, organization, or system, or the gradual passage of a liquid through a porous material.

不可数

1. Secret entryB2formalpolitical

   The act of covertly entering a place or group to gather information or influence, especially in a military or espionage context.

   秘密渗透

   • The spy was trained in infiltration techniques.
   • The enemy's infiltration of our network went undetected for months.
   • Special forces conducted a nighttime infiltration into the compound.
   • The government feared infiltration of its intelligence agencies.

   同义词incursioninsinuationintrusionpenetration

2. Liquid percolationB2formalscientific

   The slow passage of a liquid through a porous material or filter, often occurring in natural or industrial processes.

   液体渗透

   • Water infiltration into the soil is crucial for groundwater recharge.
   • The filter allows gradual infiltration of the solution.
   • Infiltration of rainwater through the pavement can cause erosion.
   • The process of infiltration is used in water purification systems.

   同义词filtrationpercolationpermeationseepage