First, there are two kinds of dashes, called en dashes and em dashes.

首先，有两种破折号， 称为 en dashes 和 em dashes。

You don’t need to worry about this; both en dashes and em dashes do the same job.

您不必为此担心； en dashes 和 em dashes 都做同样的工作。

En dashes have a space on either side of the dash – like this. Em dashes join onto the words before and after—like this.

破折号的两边都有一个空格——就像这样。 Em 破折号连接到单词之前和之后——就像这样。

The En Dash is shorter in length and can be used to represent spans of time or ranges in numbers, or to show a connection or create compound adjectives.

短破折号长度较短，可以用来表示时间跨度或数字范围，或者显示关联或是创建复合形容词。