7 · en
Short, simple sentences with “signal”, suitable for children and primary/elementary school, with common expressions and related words. You'll also find examples for middle and high school.
I didn't understand the hand signal the driver in front of me made.
With his hand on the air tank valve, Martin waited for the signal.
The rescuers were given the agreed signal, and they pulled with all their might.
First, the signal was busy; then the phone started ringing with no one answering.
Fear has, moreover, various nuances, on a scale that begins with a craving that must be interpreted as an alarm signal.
Suddenly, as if obeying a mysterious signal, the surface of the water churns, seeming to boil as hundreds of strange spherical shells emerge and then slowly take over the entire stretch of coastline.
As soon as we become aware of danger, the warning signal is sent to the nerve centres producing catecholamines - specific neurotransmitters related to fear - among which adrenaline, noradrenaline and dopamine, all three of which are composed of phenylalanine and tyrosine, two amino acids of fundamental importance in the reactions of alarm, adaptation and inhibition, stand out.
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