1. Ostracoderms are considered to be one of the earliest examples of vertebrate life.
古代珊瑚虫被认为是脊椎动物生命的早期例子之一。

2. The fossil record of ostracoderms provides important insights into the evolutionary history of jawed vertebrates.
珊瑚虫的化石记录为颌口动物的进化历史提供了重要的见解。