Numeric study of relativistic bwo with resonant reflector is present .

阐述了带有反射腔的相对论返波管的数值模拟研究。

But a major reason is surely that the bwo kinds of schools define their tasks differently .

但是其中最主要的，无疑是因为这两种学校所定义的任务是不同的。

Rule of men and rule of law are bwo different developing periods in which the human beings exist as value sense ;

人治与法治是人作为价值观念存在的两个不同发展阶段；

It is shown that the cutoff frequency of system increases with the introduction of inner coaxial conductor , the size of system can be greater than conventional corrugated waveguide bwo , large radius hollow electron beam could be used and device could operate with a low guiding magnetic field .

研究表明内导体的存在使系统截止频率升高，系统尺寸可比普通波纹波导慢波系统更大，并且可以采用大半径电子注并工作在低磁场状态。