| 单词 | 三叶虫 |
| 释义 | 〔trilobite〕Any of numerous extinct marine arthropods of the class Trilobita, of the Paleozoic Era, having a segmented body divided by grooves into three vertical lobes and found as fossils throughout the world.三叶虫：多种构成三叶虫纲任一种的已灭绝的海洋节肢动物，身体分节，有带沟将身体一分为三个垂直的叶，在世界各地都发现过其化石 |
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