The
valve is hard to close.
阀门很难关上。
School's safety
valve should be checked carefully at least once a year.
学校的安全阀门应该每年至少细致检查一次。
Tom had a heart
valve replacement in January and planed to back home next week.
Tom一月份做了心脏瓣膜置换计划下周回家。
The
valve controls the flow of water into the tank.
这个阀门控制着水流进水箱。
The engineer adjusted the
valve to regulate the pressure.
工程师调整了阀门以调节压力。
The steam engine has a faulty
valve, which needs to be repaired.
蒸汽机的阀门出了问题,需要修理。
The pilot opened the fuel
valve to ignite the engine.
飞行员打开燃油阀以点燃发动机。
The heart's mitral
valve prevents backflow of blood.
心脏的二尖瓣防止血液回流。
The plumber tightened the
valve to stop the leak.
水管工拧紧了阀门以阻止漏水。
The pressure relief
valve automatically opens when the pressure exceeds a certain level.
压力释放阀在压力超过一定水平时会自动打开。
The ball
valve is used to shut off the water supply.
球阀用来切断水源。
The diver adjusted his regulator
valve to control his breathing underwater.
潜水员调整了他的调节器阀门以控制水下的呼吸。
The
valve in the radiator helps to regulate the temperature of the engine.
散热器中的阀门帮助调节发动机的温度。
If water pipes are damaged , shut off the supply at the main valve.
如果水管破裂,请在主动阀处切断水流。