companion n. 同伴

He is my companion

“He is there, is he?”exclaimed my companion, rushing to the gap.

• fingerprint verification：指纹核对

• man-in-the-middle attack: 中间人攻击

• verbose: 冗长的

• permanently: 永久的

• fatal: 致命的，一般用大写 FATAL 加报错信息