衍生工具

derivative (finance)

to spread out / to develop / to overflow / to amplify / superfluous

to give rise to / to derive / derivative / derivation

to be born / to give birth / life / to grow / raw / uncooked / student

work / worker / skill / profession / trade / craft / labor

tool / instrument / utensil / means (to achieve a goal etc)

tool / device / utensil / equipment / instrument / talent / ability / to possess / to have / to provide / to furnish / to state / classifier for devices, coffins, dead bodies