The real benefit of having the command cache comes from the fact that you can use the new RUNCMD (or R) command to execute any command in the cache.

具有命令缓存的真正好处在于可以使用新的 RUNCMD（或 R）命令执行缓存中的任何命令。

youdao

There are two ways to display the lines in a file in reverse order: tac (the reverse of cat) and the command tail -r.

有两种方法可以逆序显示文件中的行：tac(将cat反过来)和tail - r命令。

youdao

In this command, the -r switch tells GNU Wget to recursively follow all links found on that page, so the tool will crawl the entire site.

在这个命令中，- r开关告诉GNU Wget递归地跟踪那个页面上的所有链接，所以该工具将抓取整个站点。

youdao

But Army General Tommy R Franks, who heads the US Central Command and enforces the southern no-fly zone, recommended reducing the number of patrols but maintaining a minimum number to check possible movements of Iraqi troops towards the Saudi and Kuwaiti borders.

BBC: US generals urge Iraq patrol cuts