1 (usually before a noun 通常用于名词前) connected with the way a business, machine, system, etc works 与企业、机器、系统等的运作有关的

2 (not usually before a noun 通常不用于名词前) ready for use 可使用: The new factory is now fully operational. 新工厂现已全面投产。

3 (only before a noun 只用于名词前) connected with military operations 与军事行动有关的