It's an uncommon weather event, an electrical phenomenon known as St. Elmo's fire.

这是一个罕见的天气现象，一种被称为“圣埃尔莫之火”的电现象。

In this example reciprocal change in leads I and aVL does not indicate disease in the region, under these leads, it is purely an electrical phenomenon produced by injury currentIn the inferior region.

在本例中，导联I和aVL的倒数变化并不表示该区域的疾病，在这些导联下，它纯粹是由下区域的损伤电流产生的电现象。