When we are looking at a number of species and we want to place them in a cladogram, we assemble a dataset called a character matrix that contains lots of anatomical details of the species we are studying.

当我们查看多个物种并希望将它们放在分支图中时，我们会组装一个称为字符矩阵的数据集，其中包含我们正在研究的物种的大量解剖学细节。