Thus, the thinking went, large dinosaurs must have reached very old ages indeed, but no one knew how old, because no living reptiles attain anything near the size of a dinosaur.

• 所以接下去的思路是，大型恐龙应该能活得很久；至于到底是多久，则没有人知道，因为现今的爬行类都没有长到接近恐龙尺寸的。