用處 angolul

usefulness [usefulnesses]▼(quality of being useful)
noun
[UK: ˈjuː.sfəl.nəs] [US: ˈjuː.sfəl.nəs]

utility [utilities]▼(state or condition of being useful)
noun
[UK: juː.ˈtɪ.lɪ.ti] [US: juː.ˈtɪ.lə.ti]