The direct current system is an important component of the transformer substation, but its grounding is a common defect.

直流系统是变电站一个重要的组成部分，直流系统接地是常见的缺陷。

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Its high-voltage direct current system is delivering electricity to the British Petroleum platform in the middle of the ocean.

FORBES: Magazine Article

The cost-lowering potential of direct-payment practices is heartening because the current third-party payment system has failed to stem our burgeoning health cost crisis.

FORBES: Fed Up With Obamacare, Doctors Increasingly Prefer Cash For Care