If you recall high school chemistry, pH measures the concentration of hydrogen in a solution.

如果你回忆下高中的化学实验，就知道PH值其实是衡量溶液里的氢原子浓度。

youdao

If you recall high school chemistry, pH measures the concentration of hydrogen in a solution.

如果你回忆下高中的化学实验，就知道PH值其实是衡量溶液里的氢原子浓度。

youdao