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Từ điển Oxford Advanced Learner 8th
tear gas
tear gas [tear gas tear gases] BrE [ˈtɪə ɡæs] NAmE [ˈtɪr ɡæs] noun uncountable
a gas that makes your eyes sting and fill with tears, used by the police or army to control crowds
Example Bank:
•The police fired tear gas at the protesters.
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