The second scenario is based on the first and is used to show how mediation policies can be conditionally applied based on which operation is being called.
第二种场景建立在第一种场景之上，用来演示如何根据所调用的操作应用中介策略。
The first set of fields are used by the InvocationPatternComp to decide which operation to call and which invocation pattern to use.
InvocationPatternComp使用第一个字段集来确定调用哪一个操作和使用哪一个调用模式。
The DocumentRoot instance object is the first retrieved, and is the root node used in the operation logic in Listing 8.
所检索到的第一个对象是DocumentRoot实例对象，此对象在清单8中的操作逻辑中作为根节点使用。
The first operation that used to be able to hurt Virtual Document activities was when a record would be deleted directly in the RDBMS system.
通常会对VirtualDocument活动带来负面影响的第一个操作是直接在RDBMS系统中删除记录。
Triad was the first time a major corporation used a cutout”—a front operation—“in a threatening way.
Triad公司是第一家以如此恶劣的方式进行cutout（暂时找不到贴切的中文释义）——一种前台行为——的大公司。
During these steps, some digits are selected for specific roles (e. g., first addend) in the addition operation, while the others are held in working memory, but not used in the current operation.
在这些心算步骤中，每个时刻只有一些数字被特殊地选择用于加法运算的被加数，而其他的数字则仅仅保存在工作记忆中并不用于当前操作。
Conclusion: 3d-cta should be used as the first choice for clinical diagnosis of intracranial aneurysm, and is an important reference for the surgical planning before operation.
结论：3d -CTA可做为临床诊断动脉瘤首选方法和术前确定手术方案重要参考。
In order to control the subsidence of the interval tunnel and guarantee the safety of operation strictly, pipe-jacking is used as pre-support for the first time.
为了严格控制既有环线区间隧道的沉降，确保环线地铁运营安全，首次采用了顶管作超前预支护。
1842 - Anesthesia is used for the first time in an operation by Dr. Crawford Long.
1842年的今天，麻醉剂首次被克劳福德·朗医生用于外科手术中。
When an alternate purification procedure is used, the recovered material should be subjected to the same final processing operation and the same testing as for the first time.
当采用替代的提纯方法时，获得的产品应象第一次一样，接受最后加工操作与检验。
When an alternate purification procedure is used, the recovered material should be subjected to the same final processing operation and the same testing as for the first time.
当采用替代的提纯方法时，获得的产品应象第一次一样，接受最后加工操作与检验。
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