之所以要用同一個字符來表示連續號和減號（有時還包括連接號），是早期打字機年代不得不做出妥協。但喺正式嘅出版物，三者係截然唔同嘅。
The reason for using the same character for consecutive and minus signs (and sometimes hyphens) was a compromise that had to be made in the early typewriter days. But in official publications, the three are very different.