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315 Activities V
exact: like: âm hưởng học
VNEN 
âm hưởng học * ☊ 
acoustics * ☊
[ âm ] : (1) sound; (2) lunar; (3) Yin, female, negative, minus; (4) reading (of a Chinese character)
[ hưởng ] : to enjoy; sound, echo
[ học ] : to study, learn (how to); field of study