请问一个locale问题

[月华如水2012]

我在终端中输入locale 时，系统显示：
LANG=zh_CN.UTF-8
LANGUAGE=zh_CN:
LC_CTYPE="zh_CN.UTF-8"
LC_NUMERIC="zh_CN.UTF-8"
LC_TIME="zh_CN.UTF-8"
LC_COLLATE="zh_CN.UTF-8"
LC_MONETARY="zh_CN.UTF-8"
LC_MESSAGES="zh_CN.UTF-8"
LC_PAPER="zh_CN.UTF-8"
LC_NAME="zh_CN.UTF-8"
LC_ADDRESS="zh_CN.UTF-8"
LC_TELEPHONE="zh_CN.UTF-8"
LC_MEASUREMENT="zh_CN.UTF-8"
LC_IDENTIFICATION="zh_CN.UTF-8"
LC_ALL=
请问用sort排序的时候，是按照posix区域设置还是en_US区域设置排序，这里LC_COLLATE="zh_CN.UTF-8"如何理解