Ni 📖 中文释义 [医] 镍(28号元素) 🧩 词形变化 复数 ni原形 ni 📘 English Definition（英文释义） n a hard malleable ductile silvery metallic element that is resistant to corrosion; used in alloys; occurs in pentlandite and smaltite and garnierite and millerite ← nhw N 字母词表 ni junction →