换流器单元产生的谐波会流过交流和直流线路。
The converter units generate harmonics which flow in the AC and DC lines.
然而，目前对直流线路故障暂态特性仍缺乏系统、深入的理论研究。
But there are few theories and methods for the analysis of the transient characteristics of DC line fault.
垂直流线，包括楼梯和中庭尽端的电梯，被设计为具有最大的透明度。
The vertical circulation, including the stairs and the elevator at the end of the atrium, is designed to have maximum transparency.
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