Others believe that going to classes should be optional for students.
另一些人认为学生应该可以选择去不去上课。
He said use of the operating system would be optional for all agencies.
他指出所有机构，使用那一操作系统都将成为一种选择。
Some people believe that university students should be required to attend classes. Others believe that going to classes should be optional for students.
有的人认为大学生应按要求上课，而有的人认为大学生应自行选课。你的看法是？给出原因和具体例子。
It provides a standard envelope for XML information to be transmitted through network messages, and optional conventions for the body of such messages.
它为通过网络消息传输的XML信息提供了标准的信封，并为这类消息体提供了可选的约定。
For SOA to be successful, SOA business and technical governance is not optional, it is required.
对于SOA的成功，SOA业务和技术治理不是可选的，而是必须使用的手段。
For example, matches can be described as optional, which makes it much better than SQL at querying ragged data.
例如，可以将匹配描述为可选，这使它在查询粗糙的数据时比SQL更合适。
You may recall from Part 1 that the UUID is mandatory and the service name is optional for all Bluetooth servers; however, we specified that the service name for our service would be "FTP."
您可能从第1部分回忆起来，对于所有的蓝牙服务器来说，UUID是必需的，服务名称是可选的；但是，我们为服务指定的服务名称是“FTP”。
This means that administrators will be able to choose from a number of optional components that will provide enhancements and features for Geronimo.
这意味着管理员将能够从许多可选组件中挑选一些组件来为Geronimo提供增强和功能。
Using the appropriate header entry, you can define an optional reverse message path, indicating a possible path for messages to be sent back to the initial WS-Routing sender.
使用适当的头条目，您可以定义一条可选的反向消息路径，为消息指出返回初始ws - Routing发送方的可能路径。
The Direct Load process also USES three optional processes, or phases, that require specific parameter Settings in order for them to be engaged.
DirectLoad流程还使用3个可选流程(或阶段)，它们需要特定的参数设置才能使用。
The optional input or output argument explain_schema can be used to specify the schema for the explain tables where explain information should be saved.
可选的输入或输出参数explain_schema可用于指定保存解释信息的解释表的模式。
The required attributes for this step's parameters can be set to false if the parameters are optional.
如果参数是可选的，可以将此步骤的参数所需的属性设置为false。
Support for this axis becomes optional for 2.0, except that BC mode requires that it be supported.
中对该轴的支持是可选的，不过BC模式要求支持它。
The configuration logic for Eclipse does not allow a new feature to be added if it has included optional features that are not present.
当新的功能部件包含有可选功能部件，但那些可选功能部件并不存在时，Eclipse的配置逻辑不允许添加这个新的功能部件。
The optional input or output argument explain_schema can be used to specify the schema for the explain tables where explain information should be saved.
可选的输入或输出参数explain_schema可用于指定保存explain信息的解释表的模式。
1 (it has to be optional so that the client doesn't have to enter a value before submitting for acceptance).
1(必须选择这项，以便客户端在提交之前不用必须输入一个值)。
Because a condition is automatically generated for optional inputs, no additional conditions need to be added to this transform.
由于可选输入的条件是自动创建的，因此不需要向此转换添加其他条件。
In Figure 2, a transition is reflected by an arc with annotations for the event, an optional condition, and the action to be performed.
在图2中，转移是通过带有事件注释的弧线、可选的条件以及将要执行的动作来反映的。
However, this WSDL file, or the contract, does not declare which element (s) may be a required or optional variable for the invocation.
然而，WSDL文件，或者说协议并没有指明哪一个元素是调用服务必须的或可选的变量。
These characteristics can be found in requirements and SOA solutions in various organizations today, although these characteristics are optional for SOA and mandatory for cloud.
这些特征可在当今很多组织的SOA解决方案及需求中找到，只不过在SOA中它们是可选的，而在云计算中它们是必需的。
The lesson for Brazil will be not to get too ambitious with the "optional extras" when it comes to preparing for the World Cup and Olympics.
巴西将得到一个教训：筹办世界杯和奥运会时，不要对“可有可无的锦上添花工程”抱过大雄心。
Optional temperature sensing can be added for additional system monitoring and control.
可选的温度传感器部件可以作为检测和控制系统的补充。
This step is purely optional and is to be used for testing purposes only.
该步骤纯粹是可选的，并且将仅用于测试目的。
Such information may not only be optional, but may not even be relevant for a particular use of it, such as in the retrieve operation where only the member identifier would be required.
这些信息不仅能为可选的，而且甚至还能与其特定用法相关，例如在检索操作中就只需要成员标识符。
These include defaults for optional values, methods to be called before marshalling or after unmarshalling objects, and identifier values for referencing objects.
这些选项包括：可选值的缺省值、要在数据编组对象前或数据编出对象后调用的方法，以及用于引用对象的标识值。
Developers will be freed both from the need for using a bulky type library, and the need for including optional arguments in their method calls.
开发人员再也无须引入众多的类库，或是指定调用方法时的可选参数了。
The firm plans to offer optional solar-photoelectric systems, to be set up as a car port at home, that will be able to power the cars for 80km a day without having to draw on the grid.
公司计划提供光电转能系统，即未来的太阳能车房能实现电驱车不必从电网取电一天跑80公里了。
This could become one more optional option, and a default buffer size of whatever value you prefer could be used if this option is not specified, as I've done for the "-l" number option.
这可以成为又一个可选选项，并且当没有指定该选项时，将使用您更喜欢的值作为缺省的缓冲区大小，就象我对“- l”数字选项所做的那样。
This could become one more optional option, and a default buffer size of whatever value you prefer could be used if this option is not specified, as I've done for the "-l" number option.
这可以成为又一个可选选项，并且当没有指定该选项时，将使用您更喜欢的值作为缺省的缓冲区大小，就象我对“- l”数字选项所做的那样。
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