Flexibility: Where data fields can vary in size and configuration from instance to instance.
灵活性：数据字段会在大小和配置方面随情况的变化而变化。
In the above example, range, 30, and 10 are all information that can vary from instance to instance.
在上例中，range、30和10这些信息在每个实例中都不相同。
Indeed, you want your shell to be consistent from session to session and from instance to instance — say, when multiple terminal Windows are open on your workstation.
事实上，您希望Shell能够在会话与会话之间、实例与实例之间保持一致，比如当您在工作站上打开了多个终端窗口时。
Rather than mapping columns to instance variables in application code or a mapping file, ActiveRecord generates them dynamically at runtime based on your database's information schema.
相比于把“列”映射成程序代码或映射文件中的实体变量，ActiveRecord是在运行中基于你的数据库schema动态生成映射的。
The documentation in this interface is normative with respect to instance variable names and values, method names and signatures, and exception behavior.
本界面的文档是关于实例变量名称与变量值、方法名称与签名、以及异常行为的规范。
You can bind values to instance data in XForms using two ways: Data can be made dependent on other data, or it can be bound to input provided by the user.
在XForms中，您可以用两种方法将值绑定至实例数据：可以使数据与其它数据相关，或将数据绑定至用户提供的输入。
To instance only one point: till then I had cared very little about plants and flowers, but now I found myself eagerly interested in every blossom, in every growth of the wayside.
只要举个例子就看得出来了：在这之前，我很少留意于草木花卉，可是现在我发现自己对路边每朵绽开的鲜花、每根生长的小草都兴趣十足。
To instance only one point: till then I had cared very little about plants and flowers, but now I found myself eagerly interested in every blossom, in every growth of the wayside.
只要举个例子就看得出来了：在这之前，我很少留意于草木花卉，可是现在我发现自己对路边每朵绽开的鲜花、每根生长的小草都兴趣十足。
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