每个服务实例由服务描述定义，其中每个服务描述由对应的服务版本标识。

Each of the service instances is defined by a service description, and each of these service descriptions is identified by the corresponding service version.

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大多数服务由WSDL描述定义，如图3所示，其中包含支持的消息类型和服务绑定信息的描述。

Most services are defined by a WSDL description, as shown in Figure 3, which includes a description of the supported message types and service binding information.

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他通过添加一个名称和描述定义了一个角色(在本例中为Game Developer)。

He defines a new role (in this case, Game Developer) by adding a name and description.

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Not only did we figure out a way to describe how we quantify it, but we've also quantified how we tell the difference between covalent and ionic, and percent ionic character.

我们不仅想出了一个办法来描述,我们如何定量它，而且我们也定义,我们如何分辨共价性和离子性，以及离子百分数。

麻省理工公开课 - 固态化学导论课程节选

So let's just think exactly what this means, and that means that if we take away function and we define it in terms of n, l and m sub l, what we're defining here is the complete description of an orbital.

让我们来考虑一下这是什么意思，这是说如果我们不考虑波函数,而是用ｎ，ｌ，ｍ下标ｌ来定义它，我们定义的,是一个轨道的完整描述。

麻省理工公开课 - 化学原理课程节选