initial ray原始射线initialn.(词)首字母adj.开始的；最初的；字首的vt.签姓名的首字母于initial velocity current[电] 初速电流Initial boundary problem初边值问题initial condition setter起始条件调节器initial loan's portfolioinitial conduction delay起始传导延迟initial age distribution初始年龄分布initial letter of a word单词的第一个字母； 首字母initial ignition voltage初始点燃电压initial stage of weaning断奶初期initial voltage response起始电压响应