Yán / jiū / rén / yuán / tōng / guò / xiǎn / wéi / jìng / guān / chá / le / mǎ / shì / tǐ / de / zǔ / zhī / jié / gòu研究人员通过显微镜观察了马氏体的组织结构。The researchers observed the microstructure of martensite under a microscope.