单词：cyphers
音标：['saɪfə] ；
n. [数] 零；零的记号；密码索引书
vi. 计算
vt. 计算；用密码书写
vi. 计算
vt. 计算；用密码书写
n. a mathematical element that when added to another number yields the same number
n. a quantity of no importance
n. a person of no influence
n. a quantity of no importance
n. a person of no influence