U-boat /'ju:bәut/ 📖 中文释义 n. 潜水艇 🔗 释义中的汉语词 潜水艇 🧩 词形变化 复数 u-boats 📘 English Definition(英文释义) n a submersible warship usually armed with torpedoes ← u-bends U 字母词表 U-boats →