synchronous RAM同步随机存取存储器synchronousadj.同时的；同步的synchronous trap operation[计] 同步陷阱操作synchronous phase detector同步相位检波器synchronous digital system同步数字系统synchronous electric clock同步电钟synchronously tuned filter同步调谐滤波器synchronous data switching同步数据交换synchronous transfer orbit同步转移轨道synchronous executive cycle同步执行周期synchronous parallel system同步并列系统synchronous clock operation同步时钟操作