The positive - going signal subtracts from the forward bias of the lower transistor.正向信号则使它的正向偏压减弱.Significant comorbidity such as ischemic heart disease and stroke subtracts 2 points.像缺血性心脏病和中风等明显合并症者也要减去2分.A businessma...
我的目光转向车后用带子束住的一辆小轮椅.My glance turned to a small wheelchair strapped to the back of the van.中间的不是旗, 是束住的旗杆与装饰的飘带.The middle one is not a flag, is the girdle used to gird the mast and decorations....