copper-bottomed

劍橋詞典

UK
A copper-bottomed plan , deal , or investment can be trusted completely because it is safe and certain to succeed .
（計劃、交易、投資等）安全可靠的，穩(wěn)妥保險的

having a base made of copper
銅底的
a copper-bottomed saucepan 銅底的燉鍋 返回 copper-bottomed