noun 下载 🔗分享 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) Examples : "The car's engine used a piston to compress the air and create power. " 汽车的发动机利用活塞来压缩空气并产生动力。 machine technical part device energy 与AI对话词汇游戏阅读练习
noun 下载 🔗分享 活塞，阀门 A valve device in some brass instruments for changing the pitch Examples : "The brass band's music teacher showed the students how to use the piston valves to play different notes. " 铜管乐队的音乐老师向学生们展示了如何使用活塞阀门来演奏不同的音符。 music device technical machine 与AI对话词汇游戏阅读练习
verb 下载 🔗分享 上下移动，活塞式运动 To move up and down like a piston. Examples : "The elevator pistoned up and down, carrying the workers to the different floors. " 电梯像活塞一样上下移动，把工人们送到不同的楼层。 machine technical action 与AI对话词汇游戏阅读练习
