| 单词 | backflow |
| 释义 | backflow (once / 695254 pages) n WORD FAMILY backflow USAGE EXAMPLESPumps and backflow valves have been put in place. New York Times(Nov 17, 2016) Backflow valves were installed within the water system to prevent the growth of legionella bacteria. Washington Times(Jul 02, 2016) This was to prevent a backflow of contaminated air from coming into the staging room. Richard Preston, The Hot Zone(1994) n a flow that returns toward its source Syn|Hypo|Hyper backflowing regurgitation backflow of blood through a defective heart valve flow, flowing the motion characteristic of fluids (liquids or gases) |
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