functionality
柯林斯词典
1. N-UNCOUNT The functionality of a computer or other machine is how useful it is or how many functions it can perform. 功能性
It is significantly more compact than any comparable laptop, with no loss in functionality. 它比其它任何一台同类的笔记本电脑都更便于携带，并且在功能性上无任何差别。
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functionality /ˌfʌŋkʃənˈælɪtɪ/
剑桥词典
- any or all of the operations performed by a piece of equipment or a software program
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