Woodlice attack living plants and gnaw at the stems.木虱会侵害活体植物并啃咬它们的茎。Woodlice attack living plants and gnaw at the stems...木虱会侵害活体植物并啃咬它们的茎。A rat can gnaw a hole through wood.老鼠能啃穿木头.Dogs like to gnaw on a bone.狗爱啃骨头.Gna...
隧道主要通过三迭系、二迭系 紫红色 软质砂岩、泥岩岩层.It passes mainly through the purple -- color soft sandrock and mudstone in Triassic or Dyas Systems.准噶尔盆地西北缘五八区二迭系佳木河组是含火山岩系地层,即火山岩和碎屑岩混积地层.Jiamuhe formation along the northwestern margin of t...
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...