actinides /'æktinaidz/ 📖 中文释义 [pl.] 锕类, 锕系元素, 锕化物 🧩 词形变化 原形 actinide 📘 English Definition(英文释义) n any of a series of radioactive elements with atomic numbers 89 through 103 ← actinide-lanthanide separation A 字母词表 actinidia →