Huà / xué / kè / shàng / lǎo / shī / jiè / shào / le / Mén / jié / liè / fū / de / shēng / píng / hé / gòng / xiàn

化学课上，老师介绍了门捷列夫的生平和贡献。

In chemistry class, the teacher introduced Mendeleev's life and contributions.