http://blog.sina.com.cn/s/blog_63724f620100gdv4.html 1、em dash连接的句子前后都不能有空格。 2、除非遇到天生大写的字母,em dash后接的单词不能大写,例: Juan tried begging, bribing, and even demanding cooperation from his staff—all of whom were swamped with other work—before he gave up and wr ...