In C# you can flag a value type as a nullable type by adding ? after the type (like int? x;).

在C#中，你可以在一个允许为空的值类型后面加上一个问号（比如，int? x;）。

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A persistent closure of a managed root entity x is defined as the set of managed entities C(x) ={e}, where e is reachable from x directly or indirectly via a persistent relationship.

管理根实体 x 的一个持久化闭包被定义为一个管理实体集 C(x) ={e}，其中 e 可以直接或间接通过一个持久化关系从 x 访问。

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If you do require interoperability with WebSphere application server V4.x clients or application servers, then you will need to configure the noted SAS port (c) to be static by assigning it a value.

如果您确实需要WebSphere Application Server v 4 . x客户机或者应用程序服务器具有互操作性，就需要给指定的SAS端口(c)分配一个值，将其配置为静态的。

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Cappex.com -- c-a-p-p-e-x -- matches students with colleges and universities.

VOA: special.2009.02.26

Did the same thing with c p 2, 2 2 0 Again, remind you, c p 2 is a different instance of this data type.

建立了一个x变量，我也把它赋值为，因此cp1内置有了x和y值,然后对cp2做同样的操作。

麻省理工公开课 - 计算机科学及编程导论课程节选

He still incurred -C because he ran and he also has a cost of |x-y| because he doesn't like Mr. Y winning.

他同样有-C的收益因为他参加了竞选,且他还有|x-y|的成本,因为他不喜欢Y先生获胜

耶鲁公开课 - 博弈论课程节选

The focus now should be on getting the sum of consumption spending, investment spending, government spending and exports minus imports (C, I, G, and X-M) to a level sufficient to promote growth and full employment.

FORBES: Supply Side Employment Growth

More recent data is weighed more heavily. (This was a recent change.) If you had picture A, B, and C up for one year, and then took them down in favor of pictures X, Y, and Z, then within just a couple weeks your score would be determined mostly by X, Y, and Z.

FORBES: Is Being One Of The "Most Attractive People On OKCupid" A Permanent Status?