fault signal, trouble tone
emergency signal, alarm signal
alarm вчт., alarm signal, emergency signal
emergency signal, safety signal
alarm, alert message, alarm signal, emergency signal
"To different minds, the same world is a hell, and a heaven."
J. B. Priestley
"Laziness may appear attractive, but work gives satisfaction."
"With the past, I have nothing to do; nor with the future. I live now."
Ralph Waldo Emerson
"Metaphors have a way of holding the most truth in the least space."
Orson Scott Card