单词	back pressure
释义	back pressure noun 1 : residual pressure on the exhaust side of a steam-engine piston against which the steam on the intake side must work 2 : opposition to flow of a liquid or gas due to friction, inertia, gravity, or other cause Word History First Known Use 1848, in the meaning defined at sense 1
随便看	book table book tile hang on a moment hang on someone's every word hang on to hang one on hang one's hat hang one's hat on hang one's head hang one's head in shame hang out one's shingle hang out to dry hang over hang ten hang tight hang time hang together hang tough hang with hang-fair hang-up hang-ups hang/burn in effigy hangable hangar

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