- [uncountable]
the quality in something of being very suitable for the purpose it was designed for synonym practicality实用;符合实际 - [uncountable]
the purpose that something is designed for or expected to perform Topics Engineeringc2设计目的;设计功能 - [uncountable, countable] (
computing )计算机 the range of functions that a computer or other electronic system can perform (计算机或电子系统的)功能性 new software with additional functionality 有附加功能的新软件