I have never known her do a disinterest action; she's always on the make.
我从未见她做过无利可图的事情,她总是追名逐利。
disinterest详细解释
dis.in.ter.est n.(名词)Freedom from selfish bias or self-interest; impartiality.公正,无私:摆脱偏见或自私;公正不阿Lack of interest; indifference.无兴趣;不关心,冷淡v.tr.(及物动词)To divest of interest.使兴味索然,使不关注