"the percolation of rainwater through the soil"
"the infiltration of seawater through the lava"
The southward infiltration of Albanian and Slav into districts formerly Romanized.
出自： J. L. Myres
Alleged Communist infiltration into the Oxford branch of the National Union of Railwaymen.
The only hint of human infiltration of these pastures came from distant sheep.
出自： A. Powell