Tra từ dull as ditchwater - Từ điển Oxford Advanced Learner 8th

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Từ điển Oxford Advanced Learner 8th

as dull as ditchwater (as) dull as ˈditchwater idiom (BrE) (US (as) dull as ˈdishwater)extremely boring •I always found history as dull as ditchwater. Main entry: ↑dull_idiom