The choice of Chemistry activity-class content should be accordance with the principle of interest, rationality, extract and localization.
化学活动课内容的选择，要符合趣味性、合理性、精辟性和地方性原则。
Now you can try to edit a class activity.
现在你可以尝试一下编辑课堂活动。
Some of us were confident and eager to take part in the class activity.
我们中的一些人充满信心，渴望参加班级活动。
The entertainment department of our Student Union organizes an activity in which each class shoots a short movie.
我们学生会的娱乐部组织了一次活动，每个班级要为此拍摄一部短片。
This class provides methods for installing and uninstalling packages, starting an Activity, and sending keyboard or touch events to an application.
这个类提供了安装和卸载程序包、启动一个活动以及发送键盘或触摸事件到应用程序的方法。
Speaking in front of the class and trying to persuade them to vote for our teams was an important thing we learned from this activity.
从这次活动中我们学到了在班级前讲话并试图劝说他们为我们的团队投票是非常重要的。
Now, implement the code to select, display, and save an activity for the class.
现在，实现用于选择、显示和保存课堂活动的代码。
If the project organization is using UML for modeling, unit testers will need sequence diagrams, class diagrams, and perhaps activity diagrams.
如果这个项目组织利用uml来建模，那么单元测试将需要序列图，类图，可能还会需要活动图。
Instead, the names of the input and output pins on the actions are labeled by a parameter, variable, or structural feature in the context classifier (the class owning the activity) that is in scope.
相反，操作上输入与输出的名字，会标上范围内背景标识符(拥有活动的类)中的参数、变量或者结构性特性。
The behavior of the class is described using an activity graph.
通过活动图可以清楚的描述类的行为。
Now try to edit a class activity.
现在尝试编辑课堂活动。
Our genetic inheritance, our quality of life in utero, education, class, career, lifestyle, status, levels of physical, mental and social activity are just some of the main influences.
影响衰老的主要因素有：遗传基因，胚胎发育，教育，阶级属性，事业，生活方式，身份地位，物理和精神状况，社会活动等。
Both the activity diagram and the class diagram can be organized under a collaboration element, as illustrated in Figure 11.
活动图表和类图都可以在一个协作元素下组织起来，如图11所示。
The key is for the activity to be new for each of you, like a salsa dancing class.
重点是，这项活动对于你们两个来说都是陌生的，比如萨尔萨舞。
Additionally, the same class diagram also describes the relationship between each User Goal identified during the IaD activity and the corresponding System Actor.
此外，同样的类图也描述了在IaD活动中确定的每个用户目标和相应的系统参与者之间的关系。
The second instance of the dialog occurs because an activity needs to be associated with the operation of adding the new servlet class to source control.
这个对话框需要第二次出现，是因为向源代码控制中添加新servlet类的操作需要和一个活动相关联。
Now, you can add a class activity using the Datepicker calendar.
现在，您可以使用Datepicker日历添加一个课堂活动。
This is a method defined in the Activity class and is typically overridden by any custom Activity.
这是activity类中定义的方法，通常被定制的Activity覆盖。
The compensationMap attribute contains a preloaded list of all activities (by name) and the corresponding class and method (by name) of the reversing activity.
compensationmap属性包含预先加载的所有活动的列表(按名称排列)以及相应的反转活动的类和方法(按名称排列)。
Finally, bind the Datepicker so that it shows up when editing or adding a class activity. The code to place inside the $(document).ready()
最后，绑定Datepicker 从而在添加或编辑一项课堂活动时显示出来。
The class extending the Activity class creates a window for a UI.
该类扩展了activity类，为UI创建了一个窗口。
An activity represents a user interaction, and the class extending the activity class creates a window for a UI.
一个活动代表一次用户交互，它扩展activity类，为UI创建一个窗口。
In this new thread, you then access stocks, a member variable of the enclosing Activity (the class that creates the UI).
在这个新线程中，您可以访问stocks，一个封装activity(此类创建了UI)的成员变量。
For an application as simple as this one, this is the only activity needed. For this application, a class called Converter is listed, and its source code is shown in Listing 4.
对于像本文这样简单的应用程序，有一个converter类，清单4中显示了它的源代码。
If an application consists of three Windows (for example, a login window, a text-viewing window, and a file-viewing window), each is typically represented by a different Activity class.
如果一个应用程序由3个窗口(例如，一个登录窗口、一个文本查看窗口和一个文件查看窗口)组成，那么每一个窗口通常用一个不同的Activity类来表示。
If you come up with activities like playing board games, or going to an art class, or any activity that allows on-to-one communication, you build your relationship.
如果你采用的是玩棋类游戏、或者参加艺术课程、或者任何允许一对一交流的活动的话，那么你就会创建联系。
For example, a system designer is interested in the logical and physical aspects of a system, so the most useful forms are class and sequence diagrams rather than use-case and activity diagrams.
例如，系统设计人员对系统的逻辑和物理方面感兴趣，因此最有用的形式就是类和序列关系图，而不是用例和活动关系图。
Repeated use of the reflection classes in timing-sensitive code can result in ongoing class-loading activity that introduces delays.
在时间敏感型代码中反复使用反射类可能导致持续不断的类加载活动，这会引起延迟。
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