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Use "turbofans" in a sentence
"Modern airline engines are hybrids, called turbofans, each of which contains an old-fashioned jet engine in its core but develops most of its thrust not by shooting high-speed exhaust out the back (as in pure jet designs) but by reaching forward through itself with a central shaft and spinning a propulsion fan."
"A pair of large engines poked out from the back, their noisy turbofans whining as they slowed."
"The Ecojet has much in common with the Avanti, including rear facing engines and propellers instead of turbofans."