bell signal

基本解释

Blinks tray icon when a bell signal is received
托盘图标在收到振铃信号时闪烁
Bell signal systems and communication systems must be using at same time for decline hoisting system.
斜井提升应同时设立电铃和电话两套信号系统。
Bell ringing, as a signal of non language communication, was especially prepared for the senile and infirm patients, with a satisfaction rate of 97.37%.
而摇铃主要作为年老体弱患者需要非语言交流的信号，满意率为97.37%。

There is an old adage on Wall Street: no one rings a bell to signal a market top or bottom.
FORBES: End Of Easy Money, Beginning Of A Desolate Future
"If Citi is allowed to fail, and GM is allowed to fail, those are the kind of bell-ringing events that could signal a bottom, " Arnott said.
FORBES: Magazine Article
The project (Bell Labs declines to disclose its cost) combined the work of physicists, app developers, signal processing experts and video engineers.
FORBES: Magazine Article