According to the principle of air transportationeconomics, a study is conducted on the economic variations of aircraft at each stage during its life cycle And on this basis.
运用航空运输经济原理，探讨了飞机在寿命周期内经济性变化。
2
Establishing as fast as possible military transportationeconomics is thought to be effective and important for solving difficulties encountered to military transportation system.
认为及早建立军事交通运输经济学是摆脱军事交通运输系统面临困境的有效、重要的途径。
3
A degree in this field is based upon an advanced knowledge of computer science, engineering, economics, urban planning, and transportation safety.