The "flywheel" battery, it is said, could power an electric car for 600 miles on a single charge.

据说，“飞轮”电池每充电一次可驱动一辆电动汽车行驶600英里。

《柯林斯英汉双解大词典》

I don't know which fraction of the energy can be stored in your flywheel, but it's an attempt.

我不知道哪一部分的，能量能储存在飞轮中，但这是个尝试。

youdao

The flywheel which is driven by an electric motor and "V" belts stores energy that is used only during a small portion of the crank revolution namely during deformation of the material.

飞轮由电机和三角皮带驱动，飞轮积聚地能量仅在曲柄转动地小部分范围，即材 料变形地时候才释放出来。

youdao

To be successful at a high level, and to do so with an uncanny consistency as Boise State does, an organization must prevent the proverbial flywheel from stalling once it has gained momentum.

FORBES: Boise State Football And The Blueprint For Organizational Greatness

By helping people find cabs, Flywheel increases the usage of the cabs on it system by an average of 20%.

FORBES: Cabulous Rebrands As Flywheel, Adds Non-Taxi Drivers

With a wheel off design and super flywheel, the iPhone connected bike trainer is engineered to produce an ultra-realistic road feel, equivalent to the inertia of an actual rider on the road.

ENGADGET: Wahoo KICKR Power Trainer lets iPhone cyclists feel the simulated burn (video)