HBV serums were all negative.

乙型肝炎血清全部阴性。

At home creams, serums, cleansers etc in concentrations up to 15%.

在家里面霜，血清，清洁等，在浓度高达15 %。

All groups had PPD skin test, and serums were sampled in two copies.

各组均做PPD试验，并且均留取两份血清标本。

The difficulty is getting the snake bit victims to the serums in time.

困难的是要让被毒蛇咬到人能及时注射抗毒血清。

The SERS spectra of serums from the healthy persons and rash patients were measured.

研究了皮疹患者和健康人血清的表面增强拉曼光谱。