Then we identify nutrients to feed the cell.

然后我们确定营养素来喂养细胞。

And in others, we want it to have a low affinity for oxygen oxygen, so it can dump those molecules to feed our cells.

在另一些情况下，我们希望它对氧气的亲和力很低，所以它可以丢弃这些分子来喂养我们的细胞。