foreign log外部记录foreignadj.外来的；外国的；异质的；不相符的foreign dapital usage利用外资Foreign Funds Control外国资金控制Foreign Military Sale对外军事销售foreign capital banks外资银行foreign bills payable[经] 应付国外票据(汇票)foreign currency risk外汇风险foreign trade deficit对外贸易逆差Foreign body in colon结肠内异物foreign trade systems外贸体制foreigncurrency bonds外币债券

1. Thus, optical-wavelength light can excite an electron at an impurity atom from one discrete state to another without knocking it all the way to the conduction band.
   因此，一般的光波可以将杂质原子里的电子从一个离散的能态激发到另一个，而不会把它打到更高的导带。