系统目录的英文：
system directory
n. 体系，系统；设备；制度；方法；身体；次序
Is the system unstable?
是系统不稳定吗？
It was not a perfect system.
它不是一个完美的系统。
This is a sexpartite system.
这是一个由六部分组成的系统。
Anatomically, the nervous system is divided into the central nervous system and the peripheral nervous system.
解剖学上把神经组织分为中枢神经系统和周围神经系统。
disaccord between the economic system and political system
经济体制与政治体系间的不协调
n. 名录，电话号码簿，（计算机文件或程序的）目录
The directory is not a subdirectory of the root directory.
目录不是根目录下的子目录。
catalog directory
目录登记簿
The directory service is unavailable.
该目录服务不可用。
Unable to copy XX. Destination directory is a subdirectory of the source directory.
无法复制 XX。目标目录是源目录的一个子目录。
Cannot create directory because a file or directory of that name already exists tXX
无法创建目录，因为已经存在同名的文件或目录tXX