详细解释:n. 集中, 专心
【化】 浓度; 浓缩
【医】 浓度, 浓缩, 浓缩物, 集中
【经】 集中
英语解释：
名词 concentration:
(chemistry) the strength of a solution; number of molecules of a substance in a given volume (expressed as moles/cubic meter)the spatial property of being crowded together同义词：density, denseness, tightness, compactness