ph

n.[化]酸碱度(=Potential Of Hydrogen)

abbr.公共卫生(=Public Health)

abbr.紫心勋章(=Purple Heart)

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。