signal fire

基本解释

A signal fire might attract rescuers.
信号火光会把救援的人引来。
dict.cn
The second , research the acting means of presentiment system, this part is consist of spy and patrol signal fire transferring and recovery per se.
第二部对汉代居延地区候望系统的运作方式进行研究，由侦察与巡逻、烽火传递与烽燧自身的防御等几个方面的内容构成。
So there was no half-starved band of survivors huddled in one sealed room using the computer as shipwrecked sailors would a signal fire. Just a machine that had somehow activated itself.
因此，那里没有饿的半死的生存者，卷缩在一个密封房间里，并象沉船的船员用信号火来求救一样，去使用计算机来求救。也许这只是一台机器因为某种原因，自己激活了自己吧。
kavst.cn

The explosion was a signal for all Confederate guns surrounding the fort to open fire.
That explosion would signal the other guns surrounding the fort to open fire.

The blazes could signal a difficult fire season ahead.
NPR: Fire Forces Evacuation Of Campus, Homes In Calif.
Plano, Texas was able to serve 7.5 square miles per fire station with signal preemption, compared with 5.6 square miles without it.
FORBES: Magazine Article