Because of titanosaur's size, their metabolism was very energy efficient.

由于泰坦龙体型巨大，新陈代谢率非常高。

What allowed these titanosaurs to grow so big?

是什么让这些泰坦龙长得如此巨大？

But the colossal crown goes to a group of sauropods called titanosaurs.

但巨冠要颁给蜥脚类恐龙中的泰坦龙。

They're not the biggest titanosaurs. One of them named argentinasaurs is thought to have been as long as 115 feet.

它们不是最大的泰坦龙。其中一种名为阿根廷泰坦龙，据信体长115英尺。

If you had a whale and a titanosaur of the same length, the titanosaur would weigh much less.

假设一只长度相等的鲸鱼和一只泰坦龙相比，泰坦龙会轻得多。

Reaching enough food wasn't a problem for the titanosaurs and other sauropods either.

获得充足的食物对泰坦龙和其他蜥脚类恐龙来说不成问题。

Unlike most other reptiles, titanosaurs had some bones that were hollow and filled with air.

与大多数其他爬行动物不同，泰坦龙的部分骨头中空，里面充满了空气。

Firstly, titanosaurs had a strong, stable body shape, including four pillar-like legs, sturdy joints and wide-set hips.

首先，泰坦龙有着强壮、稳定的体型，包括四条柱状腿、结实的关节和宽阔的臀部。

But it's unlikely any would quite fill the shoes of the titanosaurs.

但仍不能完全取代泰坦龙的位置。

But the current record holder for the largest specimen belongs to the newly-named titanosaur Patagotitan.

但目前最大标本的纪录保持者属于新命名的泰坦巨龙 Patagotitan。