中
가운데 중, central; center, middle; in the midst of; hit (target); attain (4)
間
틈 간, 사이 간, interval, space; place, between (12)
層
겹 층, 거듭 층, 층층대 층, storey, layer, floor, stratum (15)
中間層
중간층
a middle floor (in a multiple floor building)