Some versions of the ls tool have the -c option, which sorts by the time of file modification, showing the most recently modified files first.
有些版本的ls工具具有- c选项，它可以按照文件修改的时间进行排序，最先显示最后修改的文件。
For example, type ls [a-c] to find the files named a, b, and c.
例如，键入ls [a - c]以查找名为a、b或c的文件。
Typing ls [a-c]* finds all file names that begin with a, b, or c. Here, the * does not modify the [a-c] as grep's interpreter would; in the shell, * is interpreted as .*.
键入ls [a-c]*以查找以 a、b或c开头的所有文件名。此处的 *在Shell 中不像grep的解释器那样修饰 [a-c]，*被解释为 .*。?
The problem in the old non - reversing speed control system of LS-2 D. C casting machine with rope driving are analyzed and discussed;
对采用钢丝绳传动的LS-2型半连续铸造机的不可逆调速系统存在的问题进行了全面分析；
The problem in the old non - reversing speed control system of LS-2 D. C casting machine with rope driving are analyzed and discussed;
对采用钢丝绳传动的LS-2型半连续铸造机的不可逆调速系统存在的问题进行了全面分析；
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