underpinning /.ʌndә'piniŋ/ 📖 中文释义 n. 基础材料, 支承结构 🧩 词形变化 原形 underpin复数 underpinnings 📘 English Definition(英文释义) v support from beneathv support with evidence or authority or make more certain or confirm ← underpinner U 字母词表 underpinnings →