pH indicator短语¹⁴⁴⁹⁷²⁺² 基本例句 PH值指示剂,氢离子负指数指示剂 The accumulation of acidity material in the blood inside body and organization, its characteristic is chroma of the pH indicator in blood rises, PH value falls. 体内血液和组织中酸性物质的堆积,其特点是血液中氢离子浓度上升、 PH值下降。 iciba