The hiccup is that very little energy is generated and the harvesting mechanisms are sometimes larger than the devices they power.
这项技术的缺点是，生成的能量很小，电能捕获和贮存设备有时甚至比所供能的设备还大。
The hiccup is that very little energy is generated and the harvesting mechanisms are sometimes larger than the devices they power.
这项技术的缺点是，生成的能量很小，电能捕获和贮存设备有时甚至比所供能的设备还大。
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