Thin film transistor ( TFT ) is one type of field effect transistors ( FET ).薄膜晶体管 ( TFT ) 是众多场效应晶体管 ( FET ) 中的一种.In semiconductor receivers transistors take the place of vacuum tubes.在半导体收音机中晶体管代替了真空管.The transformer is...
偶极子在它的轴的方向上不发射能量.The dipole does not radiate energy in the direction of its axis.欲求的因子为图40那样的脉冲偶极子.The desired operator is the spike doublet of Figure 40.自然界中只能出现磁偶极子以及磁多极子的形式.Only magnetic dipole and higher multipole co...