通过实例探讨了正反馈在放大电路中的应用.This paper discusses the application of positive feedback in amplifiers.正反馈放大器是信号级 脉冲形成电路 的基础.Amplifiers with positive feedback are the bases of signal - grade pulse - forming circuits .这种控制方法虽然是有效的, ...
有700多万股换手，是通常日平均成交量的3倍。More than 7 million shares changed hands, treble the normal daily average.昨天拍卖之前的成交量很小。Trading was very light ahead of yesterday's auction.这产品的成交量很高, 每天可出三批货.This product has a fast turnover, ...
帕萨迪纳坐落于圣加布里埃尔山麓的丘陵地带。Pasadena lies in the foothills of the San Gabriel mountains.房子坐落在莫尔文丘陵地区，周围景色迷人。The house is in a lovely setting in the Malvern hills.从我们的房子里向外望去，景色宜人，一直能看到科茨沃尔德丘陵。Our house has got a splendid view a...