The beacon will have a limited beamwidth and if the body-to-beam angle exceeds this a serious loss of signal will result.

这个信标器的波束宽度有限，如果弹体波束角超过了它，信号就会发生严重的衰减。

The beacon will have a limited beamwidth and if the body-to- beam angle exceeds this a serious loss of signal will result.

这个信标器的波束宽度有限，如果弹体波束角超过了它，信号就会发生严重的衰减。

Second, it is good to have the direct light from the lamp exit at the same beam angle as the reflected light.

第二，最好灯泡发出的直接出射光和反射光有一个相同的光线角度。