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。

So, there's two drivers that switch on and off.

因此，有两个驱动程序可以打开和关闭。

These are changes to how genes are switched on and off.

这些是基因开启和关闭方式的变化。

I couldn't sing, I couldn't act, but I could turn the light switch on and off.

我不会唱歌， 不会表演，但我可以打开和关闭电灯。

With this new research, scientists are investigating how immune genes get switched on and off during and after infections.

通过这项新研究，科学家们正在研究免疫基因在感染期间和感染后是如何开启和关闭的。

And I need to flip the light switch on and off 17 times before I leave a room...

我在离开一个房间之前 一定要连续开灯关灯17次。

On and off, a bit like flicking a light switch on and off, means I was teaching a bit and then I had to stop.

On and off，有点像打开和关闭电灯开关，意思是我教学一段时间，然后不得不暂停。

When the genes involved in this process are switched on and off, it results in the variety and stripe pattern between different species of zebra.

当参与这一过程的基因被打开或关闭时，就会导致不同种类的斑马出现斑纹。

It was awarded for the development of ultra-fast lasers that can switch on and off in mere attoseconds, or quintillionths of a second.

该奖项因开发了超快激光器而获奖，该激光器可以在短短阿秒（或十亿分之一秒）内打开和关闭。

And I need to put the light switch on and off 17 times before I leave a room or my family will die.

在我离开房间之前，我需要将电灯开关打开和关闭 17 次，否则我的家人就会死去。