lì / shǐ / kè / shàng / lǎo / shī / jiè / shào / le / Tuō / luò / cí / jī / de / zhèng / zhì / sī / xiǎng

历史课上，老师介绍了托洛茨基的政治思想。

In history class, the teacher introduced Trotsky's political ideas.