cost/costly

cost /kɔst/ I.vt.(cost, cost) 1.值(多少钱)：The book costs 5 yuan. 这本书价值5元。2.花费(金钱、时间、劳力等cost sb sth)：How much did it cost you?它花了你多少钱? Writing this article will cost you much time and patience. 写这篇论文你要花很多时间，还要很有耐性。［考句］Medical doctors sometimes can make mistakes that will cost patients their lives.有时候医生的差错是以患者的生命为代价的。 ‖II. n.［c］1.成本: reduce the production cost 降低生产成本 2.价钱：The cost of meals in restaurants is going up.餐馆里的饭菜价钱一直在涨。3.费用：the cost of living 生活费用 4.用于习语 at all costs 不惜任何代价：obtain our rights at all costs 不惜任何代价取得我们的权利 at the cost of 以…为代价：finish the work at the cost of his health 为完成工作而损坏了他的身体

costly /ˈkɔstli/ adj. 昂贵的，代价高的：She was wearing a necklace of costly pearls. 她戴着昂贵的珍珠项链。Your suggestion is feasible, though it might be rather costly. 你的建议是可行的，尽管要花好多代价。