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Читатьquick to notice and react to things around you
бдительный
A young dog should be alert and playful. Teachers need to be alert to sudden changes in students' behaviour. alert ness noun [ U ]
бдительность
alert verb [ T ] uk/əˈlɜːt/ us
to warn someone of a possibly dangerous situation
предупреждать
Six hours later she still wasn't home so they alert ed the police.
ALERT noun
uk/əˈlɜːt/ us[ C ] a warning about a possibly dangerous situation
тревога
a bomb alert
be on full/red alert
to be expecting problems and ready to deal with them
быть в состоянии боевой готовности
Police in the region were on full alert against further attacks.