adj.最深的(最下面的；最低的；最基本的)
On the principle of bottommost usage of precious metals, WFEC is designing most cost-effective products for every OEM. 我們始終以最低的貴金屬用量為原則，結(jié)合每位客戶的要求設計和提供成本最優(yōu)化的催化劑產(chǎn)品。
