Operational Research is a newly emerging subject.

运筹学是一门新兴的学科。

Theory of storage is one branch of the operational research.

存贮论是运筹学的一个分支。

The work is published in the European Journal of Operational Research.

这项研究调查刊登在欧洲运筹学杂志上。

Operational research (part of component 6) was reported by 49 countries.

49个国家报告了业务研究（第6部分的一部分）。

Operational research forgets very easily, need practices repeatedly.

运筹学很容易忘记，需要反复练习。