劍橋詞典UK A copper-bottomed plan , deal , or investment can be trusted completely because it is safe and certain to succeed . （計(jì)劃、交易、投資等）安全可靠的，穩(wěn)妥保險(xiǎn)的 having a base made of copper 銅底的 a copper-bottomed saucepan 銅底的燉鍋 返回 copper-bottomed