Flywheels are another promising technology.
飞轮是另一种有前途的技术。
Flywheels are used more often than you may think.
用上飞轮的机会，远比你们想的要多。
What you see here are these flywheels at the Magnet Lab.
这些就是电磁实验室，里的飞轮。
MIT, at the Magnet Lab, has two flywheels which are amazing.
在磁铁实验室中，有俩让人惊讶的飞轮。
MIT, at the Magnet Lab, has two flywheels which are amazing.
在磁铁实验室中，有俩让人惊讶的飞轮。
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