tā / zài / dà / xué / zhǔ / xiū / dú / lǐ / xué / bì / yè / hòu / cóng / shì / yào / pǐn / ān / quán / píng / gū

他在大学主修毒理学，毕业后从事药品安全评估。

He majored in toxicology at university and later worked in drug safety assessment.