The morals has its cost, The morals cost which the reasonal economical people have cost is the guarantee of most profit permanently.
道德是有成本的，理性的经济人付出的道德成本是长期获得最大收益的保障。
2
Objective To analyse the antibacterial medicine usage in order to provide scientific foundation for the reasonal usage and management.
目的调查我院抗菌素使用情况，为抗菌素的合理使用与管理提供科学依据。
3
This thesis gives a reasonal referenle of multiple ceiling coal by cheeking the results we gave studied for several years. It has a certain guiding meaning to other mines.