血氧含量

blood oxygen level

blood / colloquial pr. [xie3] / CL:滴[di1],片[pian4]

oxygen (chemistry)

to keep / to contain / to suck (keep in your mouth without chewing)

content / quantity contained

to measure

capacity / quantity / amount / to estimate / abbr. for 量詞|量词[liang4 ci2], classifier (in Chinese grammar) / measure word