en rule
noun [ C ] publishing UK specialized uk/ˈen ˌruːl/ us/ˈen ˌruːl/ (also en dash, /ˈen ˌdæʃ/ /ˈen ˌdæʃ/)
短破折号
a short dash (= the symbol - ), used especially when typing on a computer or in printing to separate numbers
Use the en rule closed up in elements that form a range, for example, 2011-2015, Monday-Saturday, or 9.30-5.30. 使用短破折号来包括构成一个范围的要素，例如：2011-2015、Monday-Saturday，或9.30-5.30。
En rules cause most difficulty for copy-editors. 短破折号给文字编辑带来的麻烦最多。
Compare: em rule
- More examples
- An en rule is about double the length of a hyphen.
- En rules are used to mean "to" in such phrases as: 1914–18.
- Em rules are separating signals whereas en rules are joining signals.