adv.
without gain or profit
同义词：profitlesslygainlessly
in an unproductive manner
同义词：unproductivelyfruitlessly
We have lost the right to work unprofitably
Device for optimizing the unproductive motions of the holdfast beam in a machine that cuts material
Second homes in Italy: every household’s dream or (un)profitable investments?
Advantages and Disadvantages of Egret and Heron Brood Reduction
JSTOR: Evolution, Vol. 40, No. 3 (May, 1986), pp. 459-470
Property Rights in Emerging Platform Technologies
The spiral twist of the normal umbilical cord in twins and in singletons.
Hedging price volatility using fast transport ☆
X-ray imaging device
Structural transformation or elite land capture? The growth of “emergent” farmers in Zambia
