zài / dòng / wù / fēn / lèi / kè / shàng / lǎo / shī / xiáng / xì / jiè / shào / le / ruǎn / jiǎ / gāng / de / zhǔ / yào / tè / zhēng

在动物分类课上，老师详细介绍了软甲纲的主要特征。

In the animal classification class, the teacher explained the main characteristics of Malacostraca in detail.