具三裂片的

例句：

1. 1. Trilobites are one of the oldest known animal groups on Earth.
   三叶虫是地球上已知最古老的动物群体之一。
2. 2. The fossils found in the dinosaur park were mostly trilobites.
   在恐龙公园发现的化石大多是三叶虫。
3. 3.Trilobites are often used as a symbol for prehistoric life and evolution.
   三叶虫经常被用作古代生命和进化的象征。