Submitted by admin on Sat, 04/12/2014 - 21:06
definition:
A sticky flammable organic substance, insoluble in water, exuded by some trees and other plants (notably fir and pine)
sentence:
Their first step was to obtain resin from the pine trees which at that time grew in dense forests throughout Europe.
difficulty:
medium
toefl frequency:
2
toefl classification: