To put the RSS feed aggregator to work, you have to use the following command syntax (note that the last token at the end of the command syntax below is an optional command-line argument)
要想让RSS提要聚合器开始工作，必须使用下面的命令语法（注意此命令语法末的最后一个标记是一个可选的命令行参数）
An optional parameter used to display the parameters for this command.
一个可选参数，用于显示此命令的参数。
Db2pd is executed from the command line with an optional interactive mode.
db 2 pd是从命令行以一种可选的交互模式执行的。
Suffice to say, that when we define our manifest, we can declare optional dependencies on both the Felix and Equinox command line interfaces, so that when we install into either, we'll be able to run.
必须提一下，当我们定义manifest时，我们可以在Felix和Equinox命令行上声明可选依赖，这样，当我们两者中任何一个安装之后，我们就可以运行了。
The optional match section of the iptables command specifies the characteristics that a packet should have to match the rule, such as source and destination address, protocol, etc.
iptables命令的可选match部分指定信息包与规则匹配所应具有的特征（如源和目的地地址、协议等）。
This command also has two optional attributes called name and serverUrl to specify the name of the Selenium test and the server where the web application is available.
此命令还有两个可选属性name和serverUrl 用来指定Selenium测试的名称和web应用程序可用的服务器。
The optional parameters to the list command imply that the command can list specific files, or all the files, depending on how the command was invoked.
list命令的可选参数意味着该命令可以列出具体文件或所有文件，这取决于调用命令的方式。
The colon at the start of the command is optional, but it's a good idea to include it; doing so makes the command easier to locate in the (usually complex) argument list of an autocmd.
命令开始处的冒号是可选的，但是最好加上；这么做能够让命令更轻松地在一个(往往很复杂的)autocmd参数清单中定位。
The primary way you can control trace is by using the -Xtrace option on the command line or you can use the optional trace properties file if the option set is long or complex.
控制跟踪的主要方法是使用命令行选项 -Xtrace，或者在选项集比较长或复杂的情况下，使用可选的跟踪属性文件。
While in our first example, we used 'd' by itself, this time we use the 'd' command preceded by an optional numerical address.
与第一个示例中只使用'd '不同的是，这一次使用的' d '前面有一个可选的数字地址。
Where command is the YQL command and query parameter represents optional parameters to the service.
其中command是YQL命令，queryparameter表示服务的可选参数。
The optional page size argument is given in units of kilobytes, and the optional mirror flag is either 1 for mirroring, or 0 for no mirroring. The syntax for the this command is as follows.
可选页面大小参数以千字节为单位给定，且可选镜像标志是1(镜像)或0(无镜像)。
The type argument communicates the command to perform and is associated with an optional buffer with its length.
type参数是用于传递所执行的命令，它指定了可选的缓冲区长度。
Command execution also supports an optional timeout value.
命令执行还支持可选的超时(timeout)值。
The optional page size argument is given in units of kilobytes. The syntax for the this command is as follows.
可选页面大小参数以千字节为单位给定。
The optional mirror flag is either 1 for mirroring, or 0 for no mirroring. The syntax for the this command is as follows
且可选镜像标志是1（镜像）或0（无镜像）。
Optional: use this command to change code to zeros or another 6 digits.
可选：使用此命令更改代码，以零或其他6位数字。
An optional "Command channel" function provides a second audio output per channel.
一个可选的“命令通道”功能提供了第二个音频输出，每通道。
In the field Executable file command line (optional) define the parameter -y to close the console window automatically once the utility work is over.
在该领域的可执行文件的命令行(可选)定义的参数- y以关闭控制台窗口自动一旦公用事业工作已经结束。
A custom build tool specifies a command to run, a list of input files, a list of output files that are generated by the command, and an optional description of the tool.
自订建置工具可指定要执行的命令、输入档的清单、由命令产生之输出档的清单，以及工具的选择性描述。
A custom build tool specifies a command to run, a list of input files, a list of output files that are generated by the command, and an optional description of the tool.
自订建置工具可指定要执行的命令、输入档的清单、由命令产生之输出档的清单，以及工具的选择性描述。
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