“directive gain”的概念、定义、翻译、参考文献-科学参考

单词	directive gain
释义	directive gain [dǝ`rek·tiv ´gān] ^{ELECTROMAGNETISM} Of an antenna in a given direction, 4π times the ratio of the radiation intensity in that direction to the total power radiated by the antenna.
随便看	closed architecture closed association closed-belt conveyor closed-caption television closed-cell foam closed circuit closed-circuit communications system closed-circuit grinder closed-circuit pulverizing closed-circuit signaling closed-circuit telegraph system closed-circuit television closed-coil armature closed covering closed curve closed cycle closed-cycle fuel cell closed-cycle reactor closed-cycle turbine closed die closed drainage closed ecological system closed file closed fireroom system closed fold

科学参考收录了103327条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。