Under this new circumstance it is evident that the relatively lagging of maintenance theory and practice have become a problem.
在这种新的环境下，维护维修理论与实务的相对滞后问题日益凸显出来。
Finally, there is the special study about capital maintenance theory with attachment to human capital and the revenue of human capital.
最后，对与人力资本紧密相关的资本保全理论和人力资本收入问题进行了专题研究。
This paper describes the structure, the working and maintenance theory and quality control of the blood purification water processing system.
本文叙述血液净化水处理系统的结构原理，系统的运行与保养要领以及质量控制。
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