重 点
A hyphen is the punctuation sign used to join words together to make a compound, as in "left-handed." 连字符
noun [专属名词] 连字符，连字号
Each byte in a MAC address is separated by either a colon (:) or a hyphen (-). MAC 地址里每个字节都用冒号(：)或连字号(-)分开。
verb [vt. 及物动词] 用连字号连接
All options should begin with a "-" (hyphen). 所有选项都应以“-”(连字符)开头。
