有了更大的胃和更慢的消化速度，你就不需要这么多能量了。

With larger stomachs and slower digestion, you don't need as much energy.

youdao

他们有巨大的胃容量，能够在长时间段消化食物，以较慢的速度将食物转化为能量，为以后储存。

They had enormous stomach capacity, the ability to digest food over a long period, converting it to energy at a slower pace, saving it for later.

youdao

对于胃部较小的动物来说，不断寻找食物并消化的过程会消耗大量能量。

For animals with small stomachs, it takes lots of energy to constantly look for food and then digest it.

youdao