noun🔗Share活塞 A solid disk or cylinder that fits inside a hollow cylinder, and moves under pressure (as in an engine) or displaces fluid (as in a pump)"The car engine uses pistons to convert the fuel's energy into movement. "汽车引擎使用活塞将燃料的能量转化为动能。machinetechnicalpartdeviceChat with AIVocabulary GamePractice Reading
noun🔗Share活塞，阀门。 A valve device in some brass instruments for changing the pitch"The trumpet player pressed the pistons to change the notes of the song. "小号手按下活塞阀门来改变乐曲的音调。musicdevicetechnicalChat with AIVocabulary GamePractice Reading
