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radio
mastery UK /ˈɹeɪdiˌəʊ/ US /ˈɹeɪdiˌoʊ/nounverb
card 1 of 10 · fill in the blank
During the storm, the ship maintained radio _____ to avoid detection.
card 1 of 10 · fill in the blank
During the storm, the ship maintained radio _____ to avoid detection.