zài / shēng wù xué / kè shàng / lǎo shī / yòng / tú jiě fǎ / jiǎng jiě / le / shì dài jiāo tì / de / guò chéng

在生物学课上，老师用图解法讲解了世代交替的过程。

In biology class, the teacher used diagrams to explain the process of alternation of generations.