like: máy dò khói
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Composite Words Listening Comprehension Oxford Topics Duolingo Topics 315 Activities
BEGINNER LEVEL
exact:
VNEN 
máy dò khói * ☊ 
smoke detector * ☊
[ máy ] : (classifier for computers, radios); engine, machine, motor
[ dò ] : to collate, compare; to look for, search (information)
[ khói ] : to smoke
[ máy ] : machine
[ khói ] : smoke