That was a good 'un.那个东西不错。Changes in the stock market are, of course, highly un - predictable .股票市场的变化当然是 变幻莫测.In the word " unimportant " , " un - " is a prefix.在单词 unimportant 中un是前缀....
你的名字有用连字符吗？Is your name hyphenated?破折号比连字符稍长点.The dash is longer than the hyphen.下面的表达式匹配所有小写字母和连字符.The following expressions match all lowercase letters and the hyphen....