记忆方法
将“operational”分解为“oper”+“ational”。将“oper”想象为“work”（工作），而“ational”是“ational”结尾的词，联想到“national”（国家的），但在这里重点放在“work”上，所以“operational”可以想象为“工作运作的”，表示一个系统或过程正在运作或有效的。
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英语词源
- operational (adj.)
- 1922, "pertaining to operation," from operation + -al (1). Meaning "in a state of functionality" is from 1944.
权威例句
- 1. Exports have not been halted completely because another line is operational.
- 出口并没有完全停止，因为另一条生产线还能运转。
- 2. The new airport is now fully operational .
- 新机场现在可全面投入运营。
- 3. Operational Research is a newly emerging subject.
- 运筹学是一门新兴的学科.
- 4. The airport did not become operational until May.
- 机场到五月才可使用.
- 5. The nuclear industry was required to prove that every operational and safety aspect had been fully researched.
- 核工业被要求证明其在运营与安全各方面都进行过充分的研究。