“portable verifying unit (PVU)”概念、定义、翻译-科学时代

单词	portable verifying unit (PVU)
释义	交通运输工程词汇手册 portable verifying unit (PVU) 便携式验票机
随便看	signature scheme signature title signature tune signature tune signature tune sign behaviour sign bit sign bit signboard signboard sign-board sign board display sign check indicator sign code sign control flip-flop sign convention signed signed signed ballot signed division signed edition signed edition signed integer signed measure signed message

科学时代收录了1160609条科普词条，基本涵盖了常见科普常识及英语词汇的翻译，是科学学习和研究的有利工具。