还有一些额外的可选择行地补充和说明的属性，如：域名、描述。
There are a few additional properties which may be optionally added, such as site_name and description.
就像选择元素和属性一样，也可选择元素中的文本。
Just as you can select elements and attributes, you can select the text within elements.
显示属性默认值是可选择的；图2显示一个银行账户类具有一个名为balance的类型，它的默认值为0。
Showing a default value for attributes is optional; Figure 2 shows a Bank Account class with an attribute called balance, which has a default value of 0.
属性文档：两个可选择的功能值被添加到这个portlet的属性文件。
The properties file: Two optional caption values are added to the portlet's properties file.
属性节是可选择的，要是一用它，就包含类的列表显示的每个属性。
The attribute section is optional, but when used it contains each attribute of the class displayed in a list format. The line USES the following format.
可选择设置附加属性以指定搜索位置或要搜索的特性。
Optionally, set additional properties to specify where to search or what attributes to search for.
一个cookie有一个名字和一个值和一些可选择的属性例如注释、路径、域、最大有效时间、版本号等。
A cookie has a name, a single value, and optional attributes such as a comment, path and domain qualifiers, a maximum age, and a version number.
一个cookie有一个名字和一个值和一些可选择的属性例如注释、路径、域、最大有效时间、版本号等。
A cookie has a name, a single value, and optional attributes such as a comment, path and domain qualifiers, a maximum age, and a version number.
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