In case of a positive screening test, confirmation of results must be carried out via more complex chemical analysis.

如果筛选检测呈阳性，就必须通过更加复杂的化学分析来确认结果。

youdao

In case of a positive screening test, confirmation of results must be carried out via more complex chemical analysis.

如果筛选检测呈阳性，就必须通过更加复杂的化学分析来确认结果。

youdao