1. radiochemistry of zirconium and niobium 
   锆和铌的放射化学
2. A stable, corrosion-resistant zirconium alloy. 
   锆合金一种稳定而防腐蚀的锆合金
3. a gray tetravalent metallic element that resembles zirconium chemically and is found in zirconium minerals; used in filaments for its ready emission of electrons. 
   一种灰色的四价金属元素，化学性质与锆相似，发现于锆矿物中，因能迅速释放电子而用作灯丝。
4. a common mineral occurring in small crystals; chief source of zirconium; used as a refractory when opaque and as a gem when transparent. 
   一种常见的矿物，细小结晶状，是锆的主要来源，不透明的用作耐火材料，透明的用作宝石。
5. It is comprised of tiny grains(each smaller than a dust particle)of zirconium oxide(40 percent), magnesium aluminate spinel(30 percent), and alpha alumina(30 percent). 
   此材料是由细小氧化锆(４０％)，镁铝尖晶石(３０％)和α－氧化铝(３０％)颗粒(每个比灰尘颗粒还要小)组成。

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