operational use作战使用operationaladj.操作的；运作的；可用的；作战的operational transformation操作转换operational missile system实用导弹系统Operational Flight Trainer作战飞行教练机Operational Storage System作战物资贮存系统Operational Flight Control作战飞行控制operational readiness test战备检查operational motor movement作战汽车运送operational modal analysis工作模态operational control system操作控制系统, 运算控制系统Operational System Control操作系统控制

1. The scientists checked the data for all possible natural influences such as the lunar cycle as well as random variationsfound neither to be at play.
   科学家们检查了可能造成这种变化的自然因素，例如月亮运行周期和随机的变化，结果发现二者都不起作用。