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

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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

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

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