The article al (also written as el) may be attached to surnames directly, separated from surnames with a hyphen or a space, or omitted altogether.
词条al(阿拉)可以写为el(艾拉),它可以直接通过使用连字号或空格与人的姓氏写在一起,或省掉不写。
Each byte in a MAC address is separated by either a colon (:) or a hyphen (-).
MAC地址里每个字节都用冒号(:)或连字号(-)分开。
The second tar reads an archive from stdin and expands it in place; the hyphen used with the extract (x) option refers to stdin.
第二个tar命令从stdin读取归档文件并进行展开,展开(x)选项后面使用的连字号表示stdin。
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