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。
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。
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