costlyKK [ˋkɑstli] /ˈkɑstli/形容詞1昂貴的、價格高的Repairing the old roof turned out to be surprisingly costly.修理那個舊屋頂的費用出乎意料地昂貴。2代價高昂的、損失慘重的That one careless mistake proved costly for the whole team.那個粗心的失誤讓整個團隊付出了慘痛的代價。