This doesn't only mean replacing energy supply from a gas pipeline with energy supply from an electric line.

这不仅意味着用电力线取代天然气管道的能源供应。

I see now that they ride on tracks and are powered by overhead electric lines.

让：我现在看到他们骑在轨道上，由架空电线供电。

Helene's swift floodwaters took out so many power poles and electric lines, infrastructure needs to be completely rebuilt before power can be restored in some areas.

飓风“海伦”引发的洪水冲毁了许多电线杆和电线，这些基础设施需要彻底重建才能恢复供电。

This is followed by elevation of the ST segments above the eyes of electric line in these leads and this in turn is followed by alterations to the terminal portion of the QRS complex.

随后，这些导联中的ST段抬高至电线上，QRS波群末端改变。