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二次发射体
1、secondary succession───[植]次级演替;次生演替系列
2、secondary products───次级产品;副产品
3、secondary color───次生色;n.合成色,间色;二次色
4、secondary consumer───次级消费者
5、secondary───n.副手;代理人;adj.第二的;中等的;次要的;中级的
6、secondary education───中等教育
7、secondary school───n.中学;中等学校
8、secondary consideration───次要考虑
9、secondary stress───[力]次应力;次重音
1、system uses the emitter to send ultra high frequency signals after coding with signal coder and the secondary superheterodyne mixing receiver to accept the moving target signals.───XiTong中发射器采用编码器编码后发送超高频信号,接收器采用二次混频型超外差式接收移动目标信号。
2、The experimental results show that adding rare earth oxide into molybdenum can improve the secondary emission coefficient of the emitter.───实验结果表明,在钼中添加稀土氧化物可以提高发射体的次级发射性能。