The ichnofacies is the grouping of characteristic trace fossil association tending to rscirrence through a rather long interval of geologic time, and their environmental implication.

遗迹相是指一组具有特征的遗迹化石组合，在一段相当长的地质时期中不断的重视以及它们的环境意义。

The fossil dinosaur eggs included 19 species assinged to 10 genera belonged 7 families. They are assosiated with Hadrosaurs, Tyrannosaurs, Sauropods, Charophytes, Sporopollen and trace fossils et al.

据初步统计，已有7科、10属、19种之多，且与霸王龙、鸭咀龙、蜥脚类及轮藻、孢粉、痕迹化石等共生。

Dr. Tattersall believes the leap to humans may have been brought about very suddenly, perhaps by a few critical genetic changes, which is why the transition is so hard to trace in the fossil record.

塔特萨尔博士认为，转变到人类的飞跃产生已经很突然，或许由于几个重要的基因变化。 这就是为什么这个转变在化石记录里很难找到。

Birds evolved from dinosaurs, but the origin of their feathers may trace back even deeper in time, to the common ancestor of dinosaurs and pterosaurs, like the fossil at left.

鸟类是从恐龙进化而来的，但羽毛的起源则要追溯到更为久远的上古时代，恐龙和翼手龙的共同祖先才是羽毛出现的源点，例如上图左边的这块化石。

The myth is based on fossil evidence, but these days genetics can trace the path of evolution, too.

传说来源于化石,但是最近有研究表明通过遗传学的深入研究同样能够让我们追溯到物种进化的整个过程.