【医】 阳电, 正电

gram-positive

CD4-Positive T-Lymphocytes

T-Lymphocytopenia, Idiopathic CD4-Positive

non-positive-displacement machine

basic ion【化学】;cation【化学】;positive ion【化学】

positive-displacement engine

new case registration rate of smearpositive pulmonary tuberculosis

chronic biological false-positive (seroreactions for syphilis)