1·If the XML parser sees a null character in its input, it throws an exception and stops processing.
如果 XML 分析程序在其输入中看到一个空字符，它就会发出异常并停止处理。
2·For more discussion on this issue, see my article "The Null Flag Bug Pattern".
关于这个问题的更多讨论，请参阅我的文章《空标志错误模式》。
3·Therefore, it is null.
因此，它是空的。
4·Accessing the null pointer is very dangerous, as it might crash your program.
访问空指针是非常危险的，因为它可能使您的程序崩溃。
5·This method will return null if the focus owner is not in the same context as the calling thread.
如果该焦点所有者未和调用线程处于同一个上下文中，那么该方法会返回空。
1·That vector is called a "null vector".
那种矢量就叫做”零矢量“。
2·It is very important that you have the correct null modem cable with you to set up the debugging environment.
为了设置调试环境，拥有正确的零调制解调器电缆是非常重要的。
3·Several wiring layouts are in use, because the null modem connection is not covered by a standard.
有多种连接方式可供选择，因为标准中并未涵盖零调制解调器连接。
4·If you return a null array, the clients of the code must write extra code to check whether the return value is null (as shown in Listing 13).
如果您返回零数组，该代码的客户端必须编写额外的代码来检查返回值是否为零(如清单13所示)。
5·But when dealing with a collection of data, the distinction between a null array (which returns null) and an empty array (which returns itself) needs closer attention.
但是，当处理数据集合时，零数组(返回零)和空数组(返回其本身)需要密切关注。