concentration

英 [kɒns(ə)n'treɪʃ(ə)n] 美['kɑnsn'treʃən]

• n. 浓度；集中；浓缩；专心；集合

1. the strength of a solution; number of molecules of a substance in a given volume (expressed as moles/cubic meter)

2. the spatial property of being crowded together

3. strengthening the concentration (as of a solute in a mixture) by removing extraneous material

4. increase in density

5. complete attention; intense mental effort

6. bringing together military forces

7. great and constant diligence and attention