If this environment variable is not set, then the debug messages are written to standard output.
如果没有设置这个环境变量，那么调试消息被写到标准输出。
These use the LD_PRELOAD environment variable to preload a library that replaces the standard memory routines with instrumented versions.
这些工具使用LD _ PRELOAD环境变量预加载库，用于将标准内存例程替换为插装版本。
The standard way to define an environment variable under bash is
在 bash 中定义环境变量的标准方法是
The loader first looks for libraries in the path mentioned in the LD_LIBRARY_PATH environment variable and then turns to the standard paths mentioned in /etc/ld.so.conf.
加载器首先在 LD_LIBRARY_PATH环境变量所记录的路径中查找库，然后再 /etc/ld.so.conf 记录的标准路径中查找。
The user then has a standard command set of programs available to him or her from within your bash shell environment $PATH variable.
在此之后，用户就可以使用bashshell环境变量 $PATH 中指定的标准命令集。
The user then has a standard command set of programs available to him or her from within your bash shell environment $PATH variable.
在此之后，用户就可以使用bashshell环境变量 $PATH 中指定的标准命令集。
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