鸟儿在枝头欢快地啾啾鸣唱.The birds chirp merrily at the top of tree.我们像孩子一样欢快地围在一起跳舞.We danced around with childish delight.她欢快地挥手告别.She waved goodbye very gaily....
Introduced a design of microvolt signal amplifier, which consists of amplifiers, filters and isolation.介绍一种微伏信号放大系统设计方法, 该系统主要由放大 、 滤波以及隔离输出三部分组成.Where the volt is too large a unit, we use the millivolt or microvolt.如果伏特...
The shop assistant has undercharged us.售货员向我们要价很低。He had the impression that they always undercharged him.他觉得他们总是少算了帐.He undercharged me two dollars for the wine.我买这瓶酒他少收了我两美元....