5.at the expense of sb在损害某人利益的情况下；在给某人造成损失的情况下
Sceptics worry that costs may be trimmed at the expense of the patient.持怀疑态度的人担心费用的削减会以牺牲病人的利益为代价。
According to this study, women have made notable gains at the expense of men.根据这项研究, 女性以牺牲男性的利益为代价而获得了显著的收益。