| 单词 | 甲胄鱼 |
| 释义 | 〔ostracoderm〕Any of several groups of extinct primitive jawless fishes of the Ordovician through the Devonian periods in North America and Europe, having bodies that were encased in an armor of bony plates.甲胄鱼：生存于奥陶纪到泥盆纪时代北美洲与欧洲，现已绝种的原始无颚鱼类族群，其鱼身被骨板所组成的盔甲包住 |
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