flywheel

n. 飞轮, 惯性轮
【化】 飞轮

fly.wheel

n.（名词）
A heavy-rimmed rotating wheel used to minimize variations in angular velocity and revolutions per minute, as in a machine subject to fluctuation in drive and load.
飞轮：一种用于减小拐弯时速度变化和每分钟转数的粗边转轮，如减小机械在运行或装载中的变化
An analogous device, especially one used to regulate the speed of clockwork.
飞轮：尤指调整钟表里机械装置的诸如此类的设计