heartwood /'hɑ:twud/ 📖 中文释义 n. 心材 🔗 释义中的汉语词 心材 🧩 词形变化 复数 heartwoods 📘 English Definition（英文释义） n. the older inactive central wood of a tree or woody plant; usually darker and denser than the surrounding sapwood ← heartwell H 字母词表 heartwoods →