1、Thecodonts were a group of prehistoric reptiles that lived during the Triassic period.
史前爬行动物是一群生活在三叠纪的爬行动物。

2、Some of the most well-known thecodonts include species like Erythrosuchus and Postosuchus.
一些最知名的史前爬行动物包括Erythrosuchus和Postosuchus等物种。