translation.en: And he showed that if you were to take a baby and an adult and make an average of what it should look like, if it grew in sort of a linear fashion, it would have a crest about half the size of the adult. But the actual sub-adult at 65 percent had no crest at all.
translation.zh: 他把幼年鸭嘴龙 和成年鸭嘴龙放在一起比较 如果它的生长 是呈线性发展的 那么幼年鸭嘴龙应该有一个 差不多成年鸭嘴龙一半大小的顶冠 但事实上 百分之六十五即将成年的小鸭嘴龙 都没有顶冠