Clouds were done with a basic airbrush on an additional layer.

在另一个图层上用基本的喷枪绘制韵。

The ultra-pure water in which the detector is suspended adds an additional layer of radiation filtering.

而探测器悬浮在水中，这些水相当于又增加了一层辐射过滤网。

Investments through third parties, such as hedge funds, help too, providing an additional layer of protection against the misdeeds of rogues.

通过第三方（比如对冲基金）投资，也为避免无赖行径提供了更多一层保护。

Investments through third parties, such as hedge funds, help too, providing an additional layer of protection against the misdeeds of rogues .

通过第三方（比如对冲基金）投资，也为避免无赖行径提供了更多一层保护。

Other developers are turning to solutions like Kali's Anti-Piracy service, which is installed as an additional layer of protection on top of the application itself.

其它开发者一般都使用Kali的反盗版服务, 相当于在软件外面加一道防线。