yán / jiū / rén / yuán / bǎ / sōng / ruǐ / yàng / běn / dài / huí / shí / yàn / shì / guān / chá / qí / jié / gòu

研究人员把松蕊样本带回实验室，观察其结构。

The researchers brought pinecone samples back to the laboratory to study their structure.