conventions

n.约定；协定

名词convention的复数形式.

You don't type these conventions when you enter the command on the command line. 在命令行中输入命令时不必键入这些约定。

This format looks a lot like the conventions that have developed for e-mail and newsgroup communications. 这种格式看起来很象为电子邮件和新闻组通信开发的那些协定。