类似泰迪熊的搞笑电影:有哪个高手翻译一下这段英语啊。（电力系统专业英语）

Relays have an assigned area known as the primary protection zone but may properly operate in response to conditions outside this zone in these cases the provide backup protestion for the areas outside their primary zone. This is designated as the backup or overreached zone.
Selectivity lalso known as relay coordination is the process of applying and setting the protective relays which overreach other relays so that they operate as fast as possible within their primary zone but have delayed operation in their backup zone . This is necessary to permit the primary relays assigned to thes backup or overreached area time to operate.Otherwise,both sets of relays may operate for faults in this overreached area ; the assigned primary relays for the incorrect and undesirable unless the primary protection of that area fails to clear the fault. Thus selectirity or relay condination is important to assure maximum sernce continuity with minimum system disconnection.