吃透英语课本，提升在校竞争力
n. 密码；零
v. 计算；用密码书写
复数：ciphers
an expert in ciphers
密码专家
messages written in cipher
用密码写的信息
block cipher
分组密码
stream cipher
流密码；密文流
cipher code
密码
cipher out
v. 算出；（美）想出
vi.使用密码；计算；做算术
figure
cast
n.[计][通信]密码；暗号；[数]零
password
signal
nothing
vt.计算；做算术；将…译成密码
