The environment pointer is not used in most languages.
环境指针在大多数语言中并未使用。
The third field is an environment pointer for languages that use one, but is normally just set to zero.
第三个域是语言的一个环境指针(如果该语言使用了环境指针的话)，不过通常都会被设置为0。
Some garbage collection algorithms require significant cooperation from the compiler or runtime environment, such as updating reference counts whenever a pointer assignment is performed.
一些垃圾收集算法要求编译器或者运行时环境的重要配合，如当进行指针分配时更新引用计数。
This function returns a pointer to the value in the environment or NULL if there is no match.
这个函数会返回一个 指向环境中的值的指针，或者如果不匹配则返回 NULL。
This is a pointer to environment data for the program.
是到此程序的环境数据的指针。
Finally the identification methods of the signal state, pointer table, the table and the environment in substation are summed up.
最后总结了对变电站内信号灯状态、指针表、数字表和环境等的识别方法。
Finally the identification methods of the signal state, pointer table, the table and the environment in substation are summed up.
最后总结了对变电站内信号灯状态、指针表、数字表和环境等的识别方法。
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