“底群”概念、定义、翻译-科学时代

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。

单词	底群
释义	数学词汇手册底群 underlying group
随便看	data channel data channel (D channel) data characteristics data check-up data circuit data circuit-terminating equipment data circuit terminating equipment data circuit terminating equipment data circuit terminating equipment--data circuit terminating equipment（DCTE） data circuit terminating equipment (DCTE) data circuit terminating equipment（DCTE） data classification data classification data classification data coding data collection data collection data collection data collection data collection data collection data collection subsystem data collision datacom (data communications) data communication