But some tests measure not only total PSA, but another component called free PSA, which floats unbound in the blood.

但有些测试不仅仅会查总值，还会查到“游离PS A”值，会在血液中自由流动。

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The mixing heat and mixing free enthalpy of action between organic additives and PSA were studied by gas chromatography method.

用气相色谱法研究了有机添加剂与聚砜酰胺之间作用的混合热和混合自由焓。

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After the first month, in fact, the death rate among prostate-cancer patients during the PSA era was lower than it was among cancer-free men, according to the study.

CNN: STORY HIGHLIGHTS