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OXF3000N 
đáng tiếc hối tiếc lòng thương tiếc sự hối tiếc 
regret
like: sự hối tiếc → →
She has not shown any real regret for what she did. ☊ real ☊
She expressed her regret at the decision. ☊ regret ☊
He gave up teaching in 2009, much to the regret of his students. ☊ regret ☊