Any variables that are not mandatory can be null.
任何非必需的变量都可以为空。
"At least the Harvard policy is not mandatory," says Adler.
“至少哈佛的政策不是强制性的，”他说。
The explicit designation of a master slice is not mandatory.
主片的显式指定并不是强制的。
Use of a deployment plan is not mandatory to deploy all applications.
使用部署计划并不是部署所有应用程序所必需的。
Editor's note: in China, it is not mandatory to patent a drug before it is licensed.
编者按：中国并无强制性规定要求药物在许可前必须先获得专利。
Hassan said attendance is not mandatory.
哈桑表示出勤率不是强制性的。
An objects clause may be inserted in the memorandum but is not mandatory.
目的条款可以规定在公司简章中，但并不是强制性的。
This interruption mechanism is not mandatory and may not be supported by all JOLAP providers.
这种中断机制不是强制性的，不是所有的JOLAP提供程序都支持。
Comments are not mandatory parts of the Code, but provide examples and other clarification.
评述不是准则的强制要求内容，而是提供了例证及其他的澄清。
It is not mandatory to use the same initial context for both the authenticator and populator beans.
并不强制要求authenticator和populatorbean使用相同的初始上下文。
Ontario has part-day kindergarten for four-year-olds, but school is not mandatory until Grade one.
安大略省有面向四岁儿童的半日制幼儿园，不过在小学一年级以前并不强制儿童入学。
Experience working with an application server and relational database is beneficial but not mandatory.
有应用服务器和关系型服务器的工作经验更好，但不作硬性要求。
It is not mandatory to use them, but you should specify a default severity for any rules that you create.
对它们的使用并不是强制性的，但是您应该为您创建的所有规则都详细说明它们默认的严重性。
Although not mandatory nor provided in every package, it's a good idea to test the software you just built.
最好对您刚编译的软件进行测试，尽管这在每个包中并不是强制的，也没有提供相应的内容。
Enter the website URL and also sitemap URL (sitemap is not mandatory, but it is highly recommended to add one).
键入网站地址，也可以是网站地图的地址(网站地图地址不是必填的，但是强烈建议添加一个)。
The standard contains options relating to auditing methods and auditor competence but the content is not mandatory.
标准包含对审核方法和审核员能力的指南，但是这些指南不是强制性的。
To get the most value from this tutorial, it is recommended (but not mandatory) that you be familiar with the following.
为了能够从本教程中取得最大的收获，我们建议您(但并非必须)对如下内容有所了解。
When Congress modified the Paulson plan, it introduced provisions that made such a capital injection possible, but not mandatory.
国会后来对保尔森方案进行了修改，引入了让资本注入成为可能的条款，但却不是强制性的。
Using the lab service account is highly recommended, but not mandatory because you can also use local accounts on each machine.
强烈建议使用实验室服务帐户，但不强制使用，因为您还可以在每台计算机上使用本地帐户。
Experience working with various project building technologies such as Ant, autoconf, make, and nmake is beneficial but not mandatory.
如果有各种项目构建技术的经验(如ant、autoconf、make和nmake)也很好，但不做强制性要求。
Unlike cells, supplementary views are not mandatory, and their usage and placement is controlled by the layout object being used.
和单元格视图不同的是，增补视图不是强制要求的，他们的使用和位置受控于布局对象。
She says the training module only offers ideas for developing one's spiritual side. It is not mandatory and has no effect on one's career.
她表示这个训练模块只是为个人精神方面的加强提供指导，并不是强制的，对个人职业生涯不会有影响。
Auditing Guidance Statements do not establish new Auditing Standards, do not amend existing Auditing Standards, and are not mandatory.
《审计指南说明》不建立新的审计标准，不修改已经存在的审计标准，也不是强制性的。
Use of all seven techniques is not mandatory, but doing so can substantially reduce the chance that relevant candidate services have been missed.
我们并不一定需要使用所有7种技术，但是这样做可以大幅降低漏掉相关候选服务的概率。
In 1992, when helmet use was not mandatory, 90% of deaths resulting from traffic injuries were among motorcycle users, almost all due to head injuries.
在1992年头盔使用并非强制性时，由交通伤害造成的死亡中有90%发生在摩托车使用者中，几乎所有死亡都是由头部受伤造成的。
Although verification of type safety is not mandatory to run managed code, type safety plays a crucial role in assembly isolation and security enforcement.
尽管类型安全验证对于运行托管代码不是强制的，但类型安全在程序集隔离和安全性强制中起着至关重要的作用。
Note that this is not mandatory to be identical, but it makes the things easier during the configuration restore process, which is described in the next section.
注意，不一定要与现有安装完全相同，但是这样做会简化配置恢复过程（配置恢复过程将在下一节介绍）。
Note that this is not mandatory to be identical, but it makes the things easier during the configuration restore process, which is described in the next section.
注意，不一定要与现有安装完全相同，但是这样做会简化配置恢复过程（配置恢复过程将在下一节介绍）。
应用推荐