Sedimentation and denudation play a role in exceptional cases.沉积和剥蚀作用的影响只在特殊情况下起作用.Hitchhiking effects also play a role in experiments with marker genes.附加效应在以标记基因作试验中也是起作用的.Co - ordinated action on taxation will have to...
Keep away from the transformer.不要靠近那个变压器.The transformer isolates the transistors with regard to d - c bias voltage .变压器可在两个晶体管之间隔离直流 偏压.A step - down transformer has a turns ratio less than 1.降压变压器 的匝数比小于1....