Every paleontologist knows that most new species, genera, and families, and that nearly all categories above the level of family appear in the record suddenly and are not led up to by known, gradual, completely continuous transitional sequences.
每一位古生物学家都知道大多数新物种、属和科，而且几乎所有科以上的类别都是突然出现在记录中，而不是由已知的、渐进的、完全连续的过渡序列导致的。
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Paleontologists
Families