浓度

• The altitude of the peak concentration was lowest in the summer .
  在夏季，峰值浓度的高度为最低。
• At low concentrations these effects are small and variable .
  在低浓度下，这些影响很小并且是形式多变的。
• The latex concentration is raised by evaporation or centrifugation .
  通过挥发或离心作用提高胶乳的浓度。
• It also contains high concentrations of proline and hydroxyproline .
  它还含有高浓度的脯氨酸和羟脯氨酸。
• What role did a high cholesterol level play in his heart disease ?
  胆固醇浓度高和他的心脏病发作有什么关系？
• These are more commonly described as the "labile" metal concentrations .
  这些通常称之为“不稳定”金属浓度。
• There is a substantial variation in waste strength and waste treatment costs .
  废水浓度和处理费有明显差别。
• At lower concentrations they may even be stimulants of cell division .
  在浓度较低时，它们甚至能促进细胞分裂。
• The rate of substrate change is dependent of substrate concentration .
  被酶作用物变化速率取决于被酶作用物的浓度。
• A survey of four rivers in france has revealed virus concentrations .
  在法国对四条河水的调查，已经得出病毒的浓度。