Myostatin is one protein in a larger group of proteins called the transforming growth factor beta superfamily.

肌肉生素是称为转化生因子 β 家族的一大类蛋白质中的一蛋白质。

These marine reptiles, a superfamily known as the Chelonioidea, may have first appeared during that explosion of sea turtle diversity in the late Cretaceous.

这些海洋爬行动物， 一个被称为 Chelonioidea 的，能是在白垩纪晚期海龟多样性爆炸期间首次出现的。