Trilobites first appeared in the Cambrian and peaked in the early Paleozoic.

三叶虫最早出现于寒武纪，在古生代早期数量达到顶峰。

Trilobite fossils are the treasures of the museum.

三叶虫化石是博物馆的宝藏。

Biologists are looking for the cause of the extinction of trilobites.

生物学家正在寻找三叶虫灭绝的原因。

Two others of these trilobite fossils have been found in the same area.

在同一地区还发现了另外两块这些三叶虫化石。

Thee trilobite can clean a room on its own, using sound waves to feel its way around.

三叶虫可以利用声波探路，从而自己打扫房间。

Even the simple trilobite has an eye (complete with its double lens system) that's considered an optical miracle by today's standards.

按照今天的标准，即使是简单的三叶虫，它的眼睛(完美的双镜头系统)也是一个光学奇迹。

Therefore the deficiency of pre-Cambrian fossil and the sudden emergence of Cambrian trilobite are like a double edged sword posing threat for the very foundation of Darwin evolutionism.

因而前寒武纪化石的缺失和寒武纪三叶虫等突发式出现，好象一把双刃剑，对达尔文演化学说的塔基构成了威胁。