先理解核心含义，再看它在真实句子里的用法。
实用性
the quality of being useful or practical
the cost of utilities never decreases
all the utilities were lost after the hurricane
WordNet
The new software has great utility for managing large datasets.
这个新软件对管理大型数据集非常有用。
AI contextual example
We need to pay the utility bills for electricity and water every month.
我们每个月都需要支付电费和水费这些公共事业费用。
AI contextual example
A utility can help you optimize your computer's performance.
一个实用程序可以帮助你优化电脑的性能。
AI contextual example
Choose the next layer that will help you use utility with more confidence.
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Dictionary facts from ECDICT, OCTANOVE.