It simply took too much energy to feed itself in the greater heat.

在较高温度下要喂饱自己花费了它太多能量。

" Because if we had gone deep into the crust of earth, we should have encountered greater heat."

“因为如果我们深入地壳，我们应该会遇到更大的热量。”

They've also evolved greater heat toleranceto deal with the high temperatures that define dense urban environments, what we call urban heat islands.

它们还进化出了更强的耐热性， 以应对密集城市环境的高温，即我们所说的城市热岛。