main emergency feeder

例句：

1. 1. The main emergency feeder is responsible for providing clean drinking water to the entire community.
   主要紧急供水系统负责向整个社区提供清洁饮用水。
2. 2.In emergencies, the main emergency feeder is often the first line of defense.
   在紧急情况下，主要紧急供水系统往往是第一道防线。
3. 3. The main emergency feeder was damaged during the flood, which led to a shortage of water for several days.
   洪水期间，主要紧急供水系统受损，导致几天内缺水。