It is obvious th at A. C. motors are superior to D. C. motors in many appli cations.
显然，交流电机在许多应用场合比直流电机优越。
2
For the question evoked by the modification of the complementary norm, the article holds to the principle of appli...
由补充规范的变更引起的溯及力问题，应坚持从旧兼从轻原则。
3
[GUO Xianguang. Appli-cation of improved entropy method in evaluation of economic res ult[J]. System Engineering Theory&Practice, 1998, (12):98~102. ].