countersank 📖 中文释义 v. 钻孔装埋, 打埋头孔( countersink的过去式 ) 🧩 词形变化 原形 countersink 📘 English Definition(英文释义) v insert (a nail or screw below the surface, as into a countersink) ← counters C 字母词表 counterscarp →