At the time, Earth was almost completely devoid of what we'd recognize as a suitable environment for living things.

当时，地球几乎完全没有我们认为适合生物的环境。

He says this suggests an environmental improvement of the reserve, as birds naturally choose the most suitable environment for themselves.

由于鸟类总是选择最适合迁徙的环境过冬，因此张鸿说这也说明了保护区环境的改善。

They found that on average animal-dispersed plants plants experienced a 60% reduction in the ability for their seeds to move to new, more suitable environments.

他们发现，平均而言，动物传播的植物将种子转移到更合适的新环境的能力降低了 60%。

If it ends up in the landfill, you know, it's going to produce carbon emissions because it's not a very suitable environment for it to compose naturally.

如果它最终被填埋，你知道的，它会产生碳排放，因为它并不适合在这样的环境中自然分解。

During this process, the body's resources are cleverly used to shape a suitable environment for a fetus, creating an internal haven for a mother to nurture her growing child.

在怀孕过程中， 身体的资源被充分地利用来塑造一个适合胎儿生长的环境，为胎儿成长提供营养的港湾。