Submitted by admin on Tue, 08/11/2015 - 09:45
definition:
Remove impurities or unwanted elements from (a substance), typically as part of an industrial process
sentence:
Sugar was refined by boiling it in huge iron vats.
When oil is refined this reaction is used to remove unwanted alkenes.
difficulty:
easy
toefl frequency:
3
toefl classification:
adverb:
adjective:
adverb sentence:
adjective sentence:
verb:
verb sentence:
noun:
refinement
noun sentence:
These molecules are removed from our daily diets by refinement processes.