trilobite

例句：

1. 1. The fossilized remains of a trilobite are on display in the museum.
   博物馆展出了一件三叶虫化石的遗骸。
2. 2.The discovery of a new species of trilobite has sparked excitement among scientists.
   科学家发现了一种新物种的三叶虫，引起了轰动。
3. 3. Trilobites were once common in the oceans and now are rare due to pollution.
   由于污染，三叶虫曾经在海洋中很常见，现在变得罕见。