n.有用，实用，可用性

The new software has proven to be highly useful in streamlining our workflow.
新软件在优化我们工作流程方面已被证明极为有用。
Attending the workshop on time management was indeed a useful experience for me.
参加时间管理研讨会对我来说确实是一次有益的经历。
I find meditation to be an incredibly useful tool for reducing stress and improving focus.
我发现冥想是减轻压力、提高专注力的一个极其有用的工具。
Despite its age, the old book remains useful as a comprehensive reference source.
尽管年代久远，这本旧书仍作为一部全面的参考资源保持着其价值。
The government's initiative to provide free online courses is commendable for its usefulness in promoting lifelong learning.
政府提供免费在线课程的举措因其在促进终身学习方面的实用性而值得称赞。
The hiking app with offline maps proved extremely useful during our trekking trip in remote areas.
具有离线地图功能的徒步旅行应用程序在我们在偏远地区徒步旅行时被证明极其有用。
Regular physical exercise is universally acknowledged as a useful means of maintaining good health.
定期体育锻炼被普遍认为是保持健康的有效方法。
The course instructor provided us with several useful tips on how to improve our public speaking skills.
课程导师为我们提供了许多关于如何提高公共演讲技巧的实用建议。
The newly developed farming technique, although unconventional, has proven to be useful in increasing crop yields.
这种新开发的农业技术虽然非传统，但在提高作物产量方面已被证明是有效的。
The feedback from customer surveys has been invaluable in identifying areas where we can improve our product's usefulness.
从客户调查中获得的反馈对于识别我们可以改进产品实用性的领域具有不可估量的价值。