然后使用该表达式的结果创建一个新的表达式，选择具有此ID 的所有cd元素。
The result of that expression is then used to create a new expression and select all the cd elements with that ID.
只需要用字符串创建一个新的表达式(要记住，这些都只是在XML文档中定位的引用，常常被称为位置路径)。
You can simply create a new expression (remember that these are just references, often called location paths, to locations within the XML document) as a string.
函数表达式将一个函数应用到一个或多个输入参数以创建新的表达式。
Functional expressions apply a function to one or more input arguments to create a new expression.
或者，在编辑代码时，先键入此表达式并使用这种重构自动创建一个新本地变量来指定表达式的结果。
Or, when editing code, type the expression first and use this refactoring to automatically create a new local variable to assign the result to.
开发人员如果想编辑表达式树，那么不得不通过拷贝现有的一个(表达式树)来手动的创建一个新的。
Developers wishing to edit one have to manually build new expressions by copying existing ones.
创建连接表达式需要注意的一个地方是，每次连接一个表达式时，都会返回一个新的表达式，如清单9所示。
One noteworthy point about creating a join expression is that every time you join from an expression, it returns a new join expression, as shown in Listing 9.
这次我还是要创建一个新的filter类型，向正则表达式传递一个名为rfilter的闭包，并执行一些assert，以确保每件事都正常。
Again, I'll create a new filter type, pass in the regular expression closure named rfilter and execute some asserts to ensure that everything is peachy. All of this is shown in Listing 3.
利用grep的速度和正则表达式功能的高效且可移植的方法是从LDAP目录的内容创建一个按新行分隔的平面文件。
The most efficient and portable way of utilizing the speed and regular-expression capabilities of grep is to create a newline-delimited flat file from the contents of your LDAP directory.
派生列转换使用通过表达式所创建的值来填充数据流中的新列或更新现有列。
The Derived column transformation USES values created by using expressions either to populate new columns in a data flow, or to update existing columns.
若要避免创建新的命名类型所需的额外代码和开销，可以使用对象表达式。
You use object expressions when you want to avoid the extra code and overhead that is required to create a new, named type.
若要避免创建新的命名类型所需的额外代码和开销，可以使用对象表达式。
You use object expressions when you want to avoid the extra code and overhead that is required to create a new, named type.
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