costly

英 /ˈkɒstli/ 　美 /ˈkɔːstli/

Replacing the broken roof proved more costly than expected.

更换破损的屋顶比预想的花费更高。

Delaying investment in flood protection could prove costly for communities exposed to increasingly severe storms.

对于面临日益猛烈风暴的社区，推迟防洪投资可能会造成重大损失。

搭配

costly repairs 昂贵的维修a costly mistake 代价高昂的错误prove costly 结果代价高昂

虽以-ly结尾，却是形容词；也可指损失惨重。

cost (n.)、cost (v.)