1)nugatory expenditure,不必要开支2)unnecessary expenses,不必要开支3)hors,不必4)unnecessary,不必要的5)there needn t be,不必有6)dispensability,不必要性7)pronunciation change need not be made,不必音变8)needless to say,不必说9)needlessly,不必要地10)otiose,不必要的
用法例句
Its impossibility and dispensability may derivecounter-evidence from the inevitability and necessity of death.
