cost·ly/`kɔstlɪ; ˈkɒstli/ adj 1 costing a lot of money; expensive 昂贵的: Replacing all the windows would be too costly. 更换所有的窗户太费钱了。 2 causing a lot of problems, especially by making you lose something important 代价高昂的: a costly political scandal 遗害极大的政治丑闻