#
symbol
1- the hash sign, used"#"号, 用以：
1.1
- as a symbol on a phone keypad or computer keyboard［作为手机按键或计算机键盘上的一个符号］。
1.2
- before a numeral that is a number in a series［置于序列号前］：
you're breaking Rule # 1.
你正在违反1号规则。
1.3
- to represent a pound as a unit of weight or mass代表“磅”（重量或质量单位）。