lǎo / shī / zài / kè / táng / shàng / jiè / shào / le / Jiā / luó / huá / duì / shù / xué / fā / zhǎn / de / gòng / xiàn

老师在课堂上介绍了伽罗华对数学发展的贡献。

The teacher introduced Galois's contributions to the development of mathematics in class.