tetrazooid

例句：

1. 1.The tetrazooid was a large, four-legged creature that lived in the desert.
   这个四足动物是一种生活在沙漠的大型四足生物。
2. 2. The tetrazooid was a popular pet among children during the 19th century.
   这个四足动物在19世纪是儿童们的热门宠物。
3. 3.The tetrazooid was discovered by accident while studying fossils from the area.
   这个四足动物是在研究该地区的化石时偶然发现的。