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Antonyms that are in the dictionary are marked in green. Antonyms that are not in the dictionary are marked in red.
Cosmonauts Oleg Kononenko and Nikolai Chub prepare a synthetic radar communications system for installation during their seven-hour and 41-minute spacewalk.
Source: https://gizmodo.com/bubble-toxic-coolant-ends-russian-iss-spacewalk-nasa-1850961885