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315 Activities V
exact: like: ở nhiều giai tầng
VNEN 
ở nhiều giai tầng * ☊ 
at many levels * ☊
[ ở ] : to live, be, stay, remain; in, at
[ nhiều ] : much, many, a great deal, plentiful, often, numerous, abundant, a great deal
[ giai ] : (1) male (as opposed to female)
[ tầng ] : story, floor layer, stratum, stage (of a rocket)