An XML "value," computed by a query expression, may consist of zero, one, or many items, each of which may be an element, an attribute, or a primitive value.
由查询表达式计算出来的XML“值”，可为零项、一项或者多项，而其中每一项可以是一个元素、一个属性或一个原始值。
However, because an element may have at most one attribute with a given name, access to attributes can be optimized.
但是，由于一个元素对于一个给定名称最多有一个属性，因此可以优化对属性的访问权。
Depending on how the LDAP directory actually manages information stored in this attribute, one or more calls may be needed to determine all the groups that the user is a member of.
根据LDAP目录实际管理存储在此属性中信息的不同方式，可能需要一个或多个调用来确定成员用户的所有组。
The second important attribute is the class of the control, because there may be many JFrame objects displayed, but probably only one labeled Place an Order. Continue with these steps.
第二重要的属性是控件的类，因为可能会显示出许多JFrame对象，但是可能只有一个的标签为Placean Order。
Therefore, seismic amplitude as well as attenuation characteristic attribute may be much better than velocity one for the detection of the fracture system.
因此，利用地震波的振幅、衰减等属性参数检测裂缝特征比利用速度参数更有效。
The dissatisfactory performance may attribute to several reasons, while failure to form effective policy enforcement mechanism is one of the major complaints.
绩效不理想的原因是多方面的，而未能形成有效的政策实施机制是其主要原因之一。
Only one instance of this attribute may be applied to a method.
每个方法只能应用此特性的一个实例。
Only one instance of this attribute may be applied to a method.
每个方法只能应用此特性的一个实例。
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