Lead aprons shield people from radiation. 铅做的工作裙可使人免进辐射。
An adiabatic wall must be able to block radiation. 绝热壁必须能屏蔽辐射。
The radiation patterns and directivities of a dipole antenna and antenna arrays excited by sinusoidal and walsh waves are compared. 对偶极子天线和天线阵列用正弦波和沃尔什波辐射时的方向图和方向性系数进行了比较。
