ruatcaelum

例句：

1. 1. The ruatcaelum is a rare and endangered species.
   这个物种是稀有且濒危的。
2. 2. The ruatcaelum is found only in a few areas of the world.
   这种动物仅在世界上的几个地方发现。
3. 3. The ruatcaelum is an important symbol of our culture.
   这种动物是我们文化的重要象征。