横杠,就是"--",用英语怎么念?如423-1用英语怎么念啊?谢了!

hyphen
A punctuation mark ( - ) used between the parts of a compound word or name or between the syllables of a word, especially when divided at the end of a line of text.
连字号：用于一个合成词的两部分之间的或一个单词的字节之间的一种标点符号，尤其是一行或一段结束时用

Four two three hyphen one