大洋中脊 dà yáng zhōng jǐ 🔊 mid-ocean ridge (geology) + Keep this word Meanings dà yáng zhōng jǐ mid-ocean ridge (geology) Its characters 大dàbig; old (in age)HSK 1洋yángocean中zhōngwithin; among; inHSK 3脊jǐspine; backbone