单词	more poetic
释义	同poetic
随便看	back-flow backflow backflow connection backflow preventer backflow-prevention device backflow valve back flush backflush backflush chromatogram backflush costing back flushing backflushing back-flushing lubricating oil filter back focal distance back focal length back focal length--bfl back focal length，bfl back focal plane back focal point back focus back focus distance backfolding back for back force back formation