& emdash 是什么意思

One of the most enduring shibboleths in the narrative of Chinese history & emdash; heroically faithful & emdash; and clever & emdash; These two small pieces of land & emdash. 不懂期中的& dash的意思. 未见到过. 谁知道请帮忙.

通过搜索引擎在网上搜索答案:

维护