The bullet has a small magnet inside that lets it generate AC current as it spins and a microprocessor that measures those current oscillations to derive how far it's traveled.

子弹藏有一块小磁铁和一颗芯片，子弹旋转带动小磁铁产生直流电，芯片通过电流波动感知射程的远近。

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The converter units generate harmonics which flow in the AC and DC lines.

换流器单元产生的谐波会流过交流和直流线路。

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In power converters, unbalances generate undesirable DC ripple and non characteristical harmonics in the AC side.

在电力变换器中，不平衡会产生不希望的直流波动以及交流侧无特征的谐波。

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Incoming cooler ambient air from the other end of the piston causes the helium to contract and move the piston to generate AC power.

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