Submitted by admin on Sat, 05/17/2014 - 18:33
definition:
(Of a material or membrane) allowing liquids or gases to pass through it:
sentence:
A ‘carrier bed’ is a porous and permeable rock near the source rock through which petroleum flows from source to trap.
A frog’s skin is permeable to water.
difficulty:
medium
toefl frequency:
2
toefl classification: