treadmill的复数形式怎么拼写

Mr Stocks can expect a gruelling week on the publicity treadmill.斯托克斯先生可以预见下一周会被枯燥繁重的宣传工作搞得焦头烂额。I'd like to escape the office treadmill.我想摆脱办公室的枯燥工作。The treadmill has a heart rate monitor.跑步机上有个脉搏监视器....

treadmill的音标：treadmill的英式发音音标为：['tredmɪl]treadmill的美式发音音标为：['trɛdˌmɪl]...

n.踏车，单调的工作，（锻炼身体的）跑步机...