Depending on when, during the course of development, the genes are switched on and off, the stripe patterns will form accordingly.

根据发育过程中基因何时开启和关闭，条纹图案将相应形成。中，基因何时开启或关闭，条纹图案就会相应形成。

In the last episode, we saw how the course of development across different countries helped decrease the fraction of people who die from infectious diseases.

在上一集，我们看到了不同国家的发展过程是如何帮助减少死于传染病的人口比例的。

So, what happens in the course of development is, you're just trying to make your way through the world and satisfy your desires, but sometimes you're punished for them.

所以，在开发过程中发生的事情是，你只是想在这个世界上闯出一条路来满足你的欲望，但有时你会因此而受到惩罚。