Значения для термина "extreme alertness" отсутствуют.
1 The Director General sat back in his chair, a look of extreme alertness replacing his former expression.
2 The elder lady offered the two young men a sufficiently gracious salute; the little old gentleman bowed and smiled with extreme alertness .
3 An hour later he awoke with extreme alertness in response to a remark from Max as to the lateness of the hour.
4 He fixed his eyes upon the knot of men at the starboard rail; an expression of extreme alertness came over his bland features.
5 His clean-shaven face wore an expression of extreme alertness - the sort of look a ferret wears as he slips in at the mouth of a rabbit-hole.
Grammar, pronunciation and more
Это словосочетание состоит из: