usefulness
n. 有用；有用性
近义词：utility，worth，convenience，value，practicality，helpfulness，expediency，efficacy，effectiveness，handiness，advantageousness，suitability，uselessness，
英英释义
Noun
- the quality of being of practical use
例句
用作名词(n.)
- It is of the greatest usefulness.它是极有用的。
- This toolhas even more usefulness than that.这个工具比那个更有用。
- The duality of use value refers to its usefulness and rarity.使用价值的两重性指的是有用性和稀少性。