Not all components require all the values in this class, so it provides multiple constructors that implement optional arguments.
并非所有组件都需要这个类中所有的值，因此它提供了实现可选参数的多个构造器。
All of the additional parameters are optional so you specify only as much information as you want.
所有其它参数都是可选的，因此您只指定您想要的信息便可。
So it's optional whether the less-derived implemented interfaces are stated in the base type list?
那么就是说派生程度较低的接口是否被声明在基类列表中是可选的了？
And by the way, dispensing with the optional entirely (minimalism) is a valid way of handling it, if you so choose.
附带说一下，如果你选择完全摒弃(保守一点)可以选择的工作，这将是一个有效的解决办法。
So, how should you approach the problem of optional XML elements?
那么，应该如何解决可选XML元素的问题？
JSR 170 treats transactional support as an optional feature and does not impose a standard way of exposing the transactional hooks so each implementation can chose a different method.
JSR 170将事务支持视为可选特性，并没有强制一个标准的方式来暴露事务钩子，因此每个实现可以选择不同的方法。
Get tired of typing in all the arguments every time, so make some of the arguments optional, with default values.
厌倦了每次都输入所有的参数，于是让一些参数成为可选的参数，让这些参数带有默认的值。
Most of these fields are optional, so your package will not have to include every field described here if they aren't relevant to your package.
这些字段中的大多数都是可选的，因此如果有某些字段与您的软件包无关，那么您的软件包就无须包含所有这些字段。
These rules describe, for example, which elements are valid, the order of elements within a document, the data types of attributes, whether an element is required or optional, and so on.
这些规则定义哪些元素是有效的、文档中元素的次序、属性的数据类型、一个元素是必需的还是可选的等等。
Step 5 is optional; the user can choose not to do so by configuring the VM deployment task file.
第5步是可选的；用户可以通过配置VM部署任务文件来取消这个操作。
The attributes to an item are optional, so you can omit them, as shown in Listing 7 with the individual list items.
各项的属性都是可选的，因此可以忽略它们，清单7中的列表项就没有属性。
So the library books are all optional background.
所以图书馆内的书，都是可供选择的背景资料。
I decided to make the image URL an optional property so I do no validation on it.
我决定将图像url作为可选属性，这样我不用验证它。
These fields will have no semantics, but they will take up space (even if they're optional, they still logically exist) so your clients will know about them from day one.
这些字段没有语义，但是他们将占据空间(即使如果他们是可选的，他们仍在逻辑上存在)所以在日后您的客户端将知道他们。
It isn't installed by default, but is available as one of the optional program files, so you must select it during installation (see figure 1).
默认情况下将不安装ADSync，但可以将它用作可选程序文件之一，因此必须在安装过程中选中它(参见图1)。
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。
It leaves the cache optional so that the caller can just create a Butterfly object to apply an XSLT transformation, without worrying about caching or framework configuration.
这样缓存变为可选，因此，调用程序可以只创建一个Butterfly对象来应用XSLT转换，而不必考虑缓存或框架配置。
So an added safety net, if using filler fields, is to make them optional (using minOccurs="0", for instance) and to make them open-ended (using maxOccurs="unbounded").
所以添加的安全要点是：如果使用填充字段，就要使其为可选的（例如，使用minOccurs="0"）并且使其为开放式（open-ended）的（使用maxOccurs="unbounded"）。
The CommentBlock function in Listing 4, for example, assumes that the comment introducer is the optional argument that is most likely to be needed, and so places it first in the parameter list.
例如，在清单4中的CommentBlock函数，假设评论人可能是最需要的可选参数，所以将其放置在参数列表的第一位。
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。
Support for this attribute is optional for XForms processors, so many renderers do not support it.
对于X Forms处理器来说，对这个属性的支持是可选的，所以很多呈现程序都不支持这个属性。
But it is added as optional so XML data without the cell-phone element is also validated successfully.
但该元素作为可选元素添加，以便没有cell - phone元素的XML数据也可以成功通过验证。
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)。
These filters are made optional in this case so that upon initial load of the dashboard, all data will be displayed and subsequently filtered.
在这里，这些过滤器是设置为可选的，这样会增加仪表盘的初始负载，因为所有数据都会显示，并根据选择过滤。
It has several other work products as optional inputs, such as use-case realization, analysis class, glossary, and so on.
它也包括了可选择输入的一些其他工作产品，像用例实现，分析类，术语表等等。
The company is also going to continue with an optional programme that lets players use their real identities in a game if they so wish.
该公司还将继续推行一项选择性计划，让那些希望使用真实身份的玩家在游戏中使用真实身份。
The simplicity and obviousness of “we become by doing“ underscores the reality that so many of us behave as if the doing part was optional.
“我们成就于行动”这句话简单明了的说明了这个现实，即许多人都觉得实践部分是可以选择的。
So I filter all of them into a “Review Optional” folder – and if I have time, I’ll browse them at my leisure.
因此，我把这些邮件全都过滤到一个名为“随意查看”的文件夹，如果我闲得无聊，就打开来看看。
So I filter all of them into a “Review Optional” folder – and if I have time, I’ll browse them at my leisure.
因此，我把这些邮件全都过滤到一个名为“随意查看”的文件夹，如果我闲得无聊，就打开来看看。
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