uselessly
adv. 无用地;无益地
例句
I stood and watched her little lamp uselessly lost among lights.
我站在那儿看着她的灯无用地消失在众光之中。
I have made you work uselessly, we have no chance to beat their prices!
我已经让你无意义的工作,我们没有机会来挑战他们的价格。