The tar command is also generally more reliable at copying and recreating non-standard file types on systems, as the cp command does not support the -r command-line option.
通常在系统中复制和重新创建非标准的文件类型时，tar命令更加可靠，因为cp命令不支持- r命令行选项。
By using weak noncompact types conditions, we obtain an existence theorem of generalized weak solutions to (cp), improving the results of weak solutions in,.
讨论模的同态的群逆存在的条件，得到正则自同态的群逆通过弱广义逆表示的显式，并给出一些应用和例子。
By using weak noncompact types conditions, we obtain an existence theorem of generalized weak solutions to (cp), improving the results of weak solutions in,.
讨论模的同态的群逆存在的条件，得到正则自同态的群逆通过弱广义逆表示的显式，并给出一些应用和例子。
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