Or in other words, before the first call is made to the UDF an object of the class is created and kept until after the last call.
或者，换句话说，在第一次调用udf之前，就创建该类的一个对象，并且一直保留到最后一次调用这个UDF之后。
The extension after the dot names the class; the tag before the dot specifies which tag is associated with the class.
点号后面的扩展指定类名；点号前面的标记名指定与这个类相关联的标记。
A class invariant must hold before and after all method calls (once the object is constructed).
类在方法调用之前和之后必须保持不变(一旦对象已经构建)。
There are actually two types of validation error messages - those generated before the HTML form fields are bound to a class and those generated after the form fields are bound to the class.
实际上有两种错误消息类型：在捆绑html表单的时候根据类型生成的，和提交后表单元素绑定的类生成的。
You use a static class that has methods that run before and after the XmlObject changes, as shown in Listing 3.
我们使用一个静态类，其中包含在XmlObject更改之前和之后运行的方法，见清单3。
OVal also supports a means to prevalidate class members before or after a method call.
OVal也支持在方法调用前或后对类成员进行预先验证。
Fine jokes that — after a heavy class schedule and an intense internship for a Washington Congressman — school has left her burned out before she's even begun her career.
Fine开玩笑称，繁重的课程和为华盛顿国某会议员做实习生后，还未开始工作，学校就已经让她疲惫不堪。
Each base class is responsible for tracking performance before and after certain operations and will need to update system-wide performance statistics for that information.
每个基类负责跟踪某项操作前后的性能，还需要更新系统范围内这条信息的性能统计值。
One day when I was about 11, walking back to Public School 87 in Manhattan after our class visit to the Hayden Planetarium, I became overwhelmed by a feeling I'd never had before.
我11岁的时候，在参观完海顿星象馆后回到在曼哈顿但87公立学校时，我异常的兴奋，因为我从未有过这样的经历。
Never mind that the day after they would arm me with a racket before unleashing me on the rest of the class.
在我从余下的课里解放出来以前，我根本不去在乎后天他们就要让我拿上球拍了。
Listing 1 shows an example of an aspect class defining a pair of methods intended to be used as before-and-after advice on a method call.
清单1显示了一个aspect类的例子，它定义了在方法调用上，将被用作前advice和后advice的两个方法。
Finally the teacher calmly told me this title is the first question before exam, then asked me after class to explain to him why I answer on the paper is accurate.
最后老师平静的告诉我这个题目就是前天考试的第一题，接着要求我在下课后向他解释为什么我试卷上的答案准确无误。
Do the preparation before, and exercises well after class, do homework without carelessness. To make good progress, is the biggest reward to the teacher.
做好课前准备，做好课后练习，认真完成家庭作业，不敷衍了事。取得良好的成绩，就是对老师最大的报答。
Don't eat anything two hours before the class and you may eat little half an hour after the class.
上课前两小时不能进食，课后半小时方可少量进餐。
It is important that stretching is done before class, during class and most definitely after class.
重要的是，在上课前做完伸展运动，在运动时活动肯定会耽误课程。
On the class picnic, we counted noses before we left and after we left and after we arrived to be sure that no one got lost.
我们班级去野餐时，启程前和到达目的地后都清点人数，以弄清楚有没有人失散。
This paper proposed a class of approaches of seeking focusing matrix and the array signal to noise ratio after and before focusing was without any loss.
本文给出了求聚焦矩阵的一类方法，聚焦前后阵列信噪比没有任何损失。
After you have written your best draft, distribute a copy to each member of your editing group at least one day before class.
在你完成最佳初稿后，请至少在上课前一天，复印一份给同组的组员。
To improve experiment results, teachers should carry out pre-class coaching before class, guide the students in the course of the experiment and analyze and sum up the experiment after class.
为了提高实验效果，教师应在课前进行预习辅导，在实验过程中进行操作指导，在实验后进行分析总结。
To give an interesting and vivid lesson of pathology, I think three steps should be done well, including preparation before class, teaching on the class and summarizing after class.
讲授一堂生动精彩的病理学课，应做好课前准备、课堂教学、课后总结三个方面的工作。
By comparing the results of control class before and after the experiment, we've found striking difference in both the learning result and ability.
实验班前后测结果比较，学习成绩、学习能力皆出现显著差异。
Result test: Prepare the questionnaire, and utilize the paired sample t to test the difference of class management ability before and after in-post practice.
效果检验：编制调查问卷，利用配对样本t检验方法检验顶岗前后班级管理能力差异。
The steps are : comprehend the aims before class----question investigation---question study and discovery---practice and consolidation in class---problem extention after class.
它的基本程序是：课前目标领悟—课前问题导学探索—课堂问题学习研讨发现—课内问题训练巩固—课后问题拓展延伸。
After the last class before graduation, the girl asked the young professor a question as she had done before.
在毕业前的最后一节课上，这位女生又像往常一样提问题。
After lunch we had half an hour before our next class. We were free to leave the school so me and some friends would drive our cars around town.
午饭后我们上下一节课，我们能自由地离开学校，因此我和一些朋友会开着我们的车围绕着城镇转。
After lunch we had half an hour before our next class. We were free to leave the school so me and some friends would drive our cars around town.
午饭后我们上下一节课，我们能自由地离开学校，因此我和一些朋友会开着我们的车围绕着城镇转。
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