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Use "barrels" in a sentence
"Husky uses the term barrels of oil equivalent (boe) which is calculated on an energy equivalence basis whereby one barrel of crude oil is equivalent to six thousand cubic feet of natural gas."
"The term barrels of oil equivalent ( "boe") may be misleading, particularly if used in isolation."
"Folks, those are what you call barrels, and they are so big they actually are as high as a five-story building."