coston Basic wordsalso onCEFR Elementary (A2)? CEFR Upper intermediate (B2)? 代价,成本,费用, 使付出,花费 costly costly(adjective) 代价高的,昂贵的 costs costs(noun) 损失(cost的复数),诉讼费,费用 costs costs(verb) 使损失(cost的三单形式),花费 cost cost(noun) 代价,成本,费用 cost cost(verb) 使付出,花费 Forms adjectivenounverb costly costs costs cost cost