negative absorption meaning in Chinese

负呼附
负吸收作用

Determination of trace nitrite by four wavelength negative absorption - catalytic spectrophotometry
四波长负吸收催化光度法测定痕量亚硝酸根
A study on application of negative absorption spectrophotometry in add colour spectrophotometry and determination of frac ferrum
负吸光度法用于生色法的研究及痕量铁的测定
Study on determination of trace nitrite and reaction mechanism by two - wavelength negative absorption - catalytic spectrophotometry
双波长负吸收催化光度法测定痕量亚硝酸根及其反应机理的研究