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OXF3000: 
sự vắng mặt 
absence
OXF3000N sự vắng mặt absence
like: sự vắng mặt → →
She took advantage of the children's absence to tidy their rooms. ☊ take advantage of sth/sb ☊
explanation (for sth): I can't think of any possible explanation for his absence. ☊ explanation ☊