She sat there crocheting all day.她整天坐在那里用钩针编织东西.The crafts teacher is skillful in knitting , crocheting, embroidery, and the use of the hand loom.手工艺教师善于纺织、钩编 、 刺绣和使用手摇织布机....
变压器可在两个晶体管之间隔离直流 偏压.The transformer isolates the transistors with regard to d - c bias voltage .正向信号则使它的正向偏压减弱.The positive - going signal subtracts from the forward bias of the lower transistor.当正向偏压足够高时, 扩散电容很容易超过空间电荷压...