【电子学】指令脉冲 burst of pulses: 脉冲噪; 群脉冲cereals and pulses: 禾谷类和豆类coincidence of pulses: 脉冲符合discrete pulses: 不连续脉冲echo pulses: 回波脉冲下载手机词典可随时随地查词查翻译