lǎo shī / tōng guò / jǐ ge / shí jì / àn lì / bāng zhù / xué shēng / bǎ / chōu xiàng de / gài niàn / jù tǐ huà

老师通过几个实际案例，帮助学生把抽象的概念具体化。

The teacher used several real-life cases to help students concretize the abstract concept.