null-当遇到null值时，打印用户提供的文本。
Null - When null values are encountered, print user-provided text.
清单2展示了打印用户结构的结果，该结构在Ruby中为一个Hashie：Mash。
Listing 2 shows the result of printing the user structure, which in Ruby is a Hashie: : Mash.
现在站点PRINTER就拥有了从站点PHOTO读取照片的许可权限，并且能够按需打印用户的照片。
Now site PRINTER has permission to read the user's photos from site photo and will be able to print that user's photos on demand.
办公室网络让用户共享文件和软件，并使用中央打印机。
The office network allows users to share files and software, and to use a central printer.
插件使用这一位置信息为该用户查找当地气象信息，定位当地的饭店、打印机和自助餐厅。
The plug-in uses that location information to find the local weather and to locate local restaurants, printers, and cafeterias for that user.
事实上，您通常需要避免使用HTML标记，因为它们都将直接打印给用户。
In fact, you generally want to avoid HTML tags because they print directly to the user.
如果成功打开文件，脚本将继续执行并把关于zip归档的一些信息打印给用户。
If we successfully open the file, the script moves on and prints some information about the ZIP archive to our users.
电子邮件可能包含附件，用户需要打印接收的文件。
Email involves attachments, and users need to print files that they receive.
用户可以利用标准的PDF功能打印或者保存报表。
The user can print or save the report using standard PDF functionality.
例如，我们见过客户端将用户密码打印到跟踪文件中。
For example, we've seen clients that print user passwords to a trace file.
大多数的字体要么是从字体打印的角度设计，要么是为了用户交互界面而创造。
Most fonts in use at the time were either adapted from type designed for print, or were created primarily for user interface elements.
它打印出唱片的列表，并让用户挑选期望的那些。
It prints a list of albums and lets the user pick the desired ones.
例如，如果输入含有100页，则用户可指定只打印第35至65页。
For example, if the input contains 100 pages, the user can specify printing only pages 35 to 65.
打印站点把用户定向到保存照片的站点以便获取授权。
The printer website sends the user to the photo site to grant access.
交互的过程如下：用户登录照片打印站点并发出打印照片的指令。
The interaction goes something like this: the user signs into the printer website and place an order for prints.
打印站点询问需要打印哪些照片，用户选择保存照片的网站(从打印站点提供的网站列表中选择)。
The printer website asks which photos to print and the user chooses the name of the site where her photos are stored (from the list of sites supported by the printer).
然后打印文件名，让用户知道我在创建什么。
Next, I print the name of the file to let the user know what I'm creating.
在PDF打印模式下，先显示出一个PDF，然后用户可以选择打印。
In PDF print mode, a PDF displays, and then the user can choose to print it.
用户提前团购，然后打印用于兑换该笔交易的优惠券。
Users buy deals in advance and then print out a coupon that's used to redeem the deal.
pdf打印格式中，一个PDF将会被显示，允许用户打印它。
In PDF print mode, a PDF will be displayed, allowing the user to then print it.
然后该方法会为用户打印出URL，以授予用户访问存储在 Twitter 上的数据的权限。
The method then prints out the URL for the user to authorize access to his or her data stored on Twitter.
这里有一个打印/传真/EDI用例：用户可以在WebSpherePortal页面选择一些工作订单，然后进行打印/传真/EDI。
There is a print/fax/EDI use case: The user can select some work orders and print/fax/EDI in the WebSphere Portal page.
CUPS比SysV打印更加灵活和用户友好，而且它提供了一个与遗留打印系统无缝集成的兼容层。
CUPS is more flexible and user friendly than SysV printing, and it offers a compatibility layer that integrates seamlessly with legacy printing.
我再次打印出标签信息，提醒用户我们正在讨论什么，然后用WebService：FreeDB的outstd函数打印出唱片信息。
I print out the tag info again to remind the user what it is we're talking about, then print out the disk information with the outstd function from WebService: : FreeDB.
例如，可能存在有关授权哪些用户使用或管理哪些打印机的规则。
For example, there could be rules about which users are authorized to use or manage which printers.
假定我们有一个新的J2EE人力资源系统，可允许用户执行打印相关的任务，如将文档发送到打印机和查看与管理打印队列。
Suppose that we have a new J2EE human resources system that lets users perform certain print-related tasks, such as sending a document to a printer and viewing and managing print queues.
例如，使用者应用程序将依据用户所选的打印机名称，查找具有不同名称的打印服务。
For example, a consumer application looks up printing services with different names depending on the printer name selected by the user.
在标准输出中会打印一条消息以让用户知道发送了一个信号。
A message is printed on standard output to let the user know a signal was sent.
除非要为每台打印机提供特殊选项，比如限制用户，通常使用模板便已足够。
Unless you need to offer special options per printer, such as restricting users, you can usually get away with the template.
在保存照片的站点用户使用用户的帐号登录，并询问用户是否允许打印站点使用她的照片。
At the photo site the user signs into her account and is asked if she really wants to share her photos with the printer.
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