costsn.费用；讼费名词cost的复数形式.costn.费用；成本；代价；[律]诉讼费用v.花费；使付出；使做不愉快的事；估算成本Cost lowering降低成本cost of goods商品成本cost quotiety成本系数cost tradeoff成本交替损益,成本权衡cost variance成本差异costochondral肋骨软骨的cost schedule生产费用表,成本表列cost prospect成本预测cost and risk成本与风险costuslactone木香内酯