translation.en: And through a process of selection evolution, you can pull one out of a billion that does something that you'd like it to do, like grow a battery or grow a solar cell.
translation.zh: 通过一个选择性进化的过程， 可以从十亿中选出一个符合你期望的病毒， 比如长出一个电池或是一个太阳能电池。