normally extinguished signal lamp

例句：

1. 1. The firefightersextinguished the blazewith water.
   消防员用水扑灭了大火。
2. 2. The extinction of the species isa major environmental issue.
   物种灭绝是一个重要的环境问题。
3. 3. The fire was extinguished by the sprinklers installed in thebuilding.
   建筑物安装的喷淋系统扑灭了火势。