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LEOs Zusatzinformationen: to be concerned | to be concerned about so. | to be concerned about sth. - волноваться | волноваться о ком-л./чём-л.

o

to be concerned | to be concerned about so. | to be concerned about sth.

Definition (American English)

be, concerned, concern, about, so.
Merriam Webster

Thesaurus, synonyms, antonyms

be, concerned, concern, about, so.
Merriam Webster

Etymology

be, concerned, concern, about
Online Etymology Dictionary
o

волноваться | волноваться о ком-л./чём-л.

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