operational

Compared meaning: ready to work or be used (adjective).

比较义项：运作的，可用的（形容词）。

• operational 本词

  Formal word for machines, systems, or facilities that have been installed, tested, and are now functioning as intended; suggests official readiness for service, not used for small everyday objects.

  用于机器、系统或场所，指其已安装、测试完毕并正式投入运行，强调正式的可运行状态，不用于日常小物件。

  All systems are now operational and monitoring is live.

  所有系统现已正式运作，监控也已上线。

• usable

  Simply means something still works or can serve its basic function, with no sense of official readiness; applies broadly, including old, damaged, or repaired everyday items.

  只是说某物仍能使用、还能实现基本功能，不带正式启用的意味，适用范围更广，包括旧的、损坏过或修好的日常物品。

  After cleaning it, the old laptop was still perfectly usable.

  清理之后，这台旧笔记本电脑依然完全可以使用。

Operational and usable both mean something is ready to use, but differ in formality. Operational is more formal, for machines, systems, or facilities that have been installed and tested, now functioning. Usable means something works or serves its function, with no sense of official readiness.

这两个词都可以表示某样东西已经能够使用，但语气不同：operational 更正式，强调设备、系统或场所经过安装、测试或修复后正式投入运行；usable 更口语化，只是说某物还能用、功能还正常，不涉及正式启用的意味。