noun
concentration
/.kɒnsәn'treiʃәn/
concentration 是什么意思
集中,专心,浓度
The strength of a solution; number of molecules of a substance in a given volume the spatial property of being crowded together strengthening the concentration (as of a solute in a mixture) by removing diluting material increase in density.
词性
noun
难度
进阶
页面用途
检索复习