Together, they store more than 25 petabytes ( 25 million gigabytes) of information.

If you want to scale to the petabyte level, or the billion requests a day, you need to be

如果你想伸展到拍字节（Petabyte，2的50次方，约千万亿）的级别，或者每天数十亿请求，你就需要

Hipal, for example, is a tool that aims to make analyzing petabytes of data easy for anyone in the company.

比如，HiPal就是一个旨在让公司所有员工都能方便地分析高达拍字节数据的工具。

Cisco offered a comparison that suggests how big mobile has become: the traffic on mobile data networks in 2012 885 petabytes was nearly 12 times greater than total Internet traffic around the world in 2000, back when the web was taking off.

思科提供的一组对比数据显示了移动领域的规模增长：2012年移动数据网络上的流量为885拍字节，较2000年全球互联网总流量高出近12倍。

Firstly, this scheme implements a multi-scale morphological open-close filter, to get the low-frequency smooth image for the source image.

这种方法首先对源图像进行多尺度形态学开闭滤波，得到源图像的低频平滑图像；

However, in general, the existence of proprietary software is fine by me, and I even buy some closed-source software if it does something I want done well enough to be worth the money.

不过，总的来说，专有软件的存在，我是不介意的，而且，如果闭源软件物有所值，我甚至还会购买。

Actually, it'd probably work for closed-source projects as well; the only difference in that case is that the mailing list should, of course, not be visible to the public.

实际上，对闭源项目也是可行的；唯一的差别是邮件列表要对公众不可见。

Many people pushing for open source solutions are overtly hostile to entities which produce and work on open source, but which even cooperate with closed-source vendors.

推崇开源解决方案的很多人对于那些制作并致力于开源而又与闭源供应商合作的实体过于敌对。

So support can be just as "commercial" in an open source environment as in a closed-source one.

所以支持服务在一个开源环境中可以如同闭源环境中的那般“商业化”。

Similarly, some vendors who are active in closed-source markets tend to be hostile to open source.

同样地，一些对闭源市场十分积极的供应商对开源也心怀敌意。

Whether closed source or open source, development systems live and die by their documentation.

不管选择开源还是闭源的形式，开发系统成败的关键就是文档。

Reverse Analysis is an important approach to analyze software without source code.

逆向分析是用于分析闭源软件的重要方法。

With commercial proprietary closed software, the opposite is true.

而对于商业的私有闭源软件，情况正好相反。

The reality is that many closed-source vendors are not particularly evil or malicious, are not concealing rootkits, and are just trying to make a living in a way that they know how to make work.

事实是很多闭源供应商并不那么地邪恶或恶毒，也并不故意要隐藏rootkit，他们只不过是在试图借助自己的所知所能谋生而已。

Last month there was an uproar over hosting Sandcastle, a closed-source tool, on the open source site CodePlex.

上一个月，在Sandcastle的托管问题上出现一些吵闹，这是源于这样的一个闭源工具，却放在开源网站CodePlex上。

GCC is the cornerstone of development in both the open source and closed source worlds.

无论是开源开发还是闭源开发，GCC都是开发的基础。

I sometimes mind specific packages being closed source, especially when they don't work and the vendor doesn't care.

我有时也会介意某些包是闭源的，尤其是当这些包不能正常工作，而其供应商又毫不在乎时，就更是如此。

However, the present optical communication systems are all based on the property of wave.

现有的光通信系统只基于光信号的波动性。

A judgement experiment for undulatory theory of light

光的波动说判定性实验

The wave character of light forms phenomenon of interference, diffraction and polarization of light, and so on. The following paragraphs illustrate each of the phenomena respectively.

光的波动性形成了光的干涉、衍射、偏振等现象。下面对三者逐一说明。

We assume that students are familiar with the wave character of light such as the fact that the wavelength can be determined from interference effects.

我们假定读者都熟悉光的波动性，例如从干涉效应可以测定波长这样的事实。