We have found that these masks work exceedingly well.

我们发现口罩效果非常好。

And at 250 frames per second, it shows us exactly why masks work to slow airborne infection.

每秒 250 帧，这向我们展示了为什么口罩可以减缓空气感染。

And the second way masks work, is that any droplets that do get through now have less momentum.

口罩的第二种工作方式是所有设法通过的液滴移动的力量都变小了。

It should be pretty clear to you now why masks work, and the body of research that proves that is getting stronger all the time.

你应该已经很清楚为什么要戴口罩了，证明了它有效的研究也越来越有说服力。

Now, to set up his network, Viktor Bout and his organization needed to set up a number of shell companies — to mask their work and to launder the money, to launder the proceeds of crime.

现在，为了建立他的网络，维克托·布特和他的组织需要建立一些空壳公司——以掩盖他们的工作并洗钱，洗钱犯罪所得。