Despite this diversity and the fact that certain organisms can grow at extremes of the pH scale, generalities can be made. 纵然有差异而事实上有些生物是可以在极端的酸碱度范围上生长，仍可以得到一些归纳结果。
This article means to study the calculation of acidity or basicity for the mixed acid -- base solution. 本文对混合酸碱溶液的酸碱度计算作一探讨。
