• 稀有金属

rare old异乎寻常的, 极度的rareadj.罕见的；珍贵的；煎得嫩的rare damage from chilling temperature罕见低温冷害rare and clump vegetation distribution稀疏群团植被分布Rare protection evergreen woody plants珍稀保护常绿乔木rare earth permanent magnetic material稀土永磁材料RAREFIED GAS FLOWS IN MICRO-CHANNELS微槽道气体流动的统计模拟Rare-earth permanent magnet material稀土永磁材料rare earth magnetic nano-microspheres稀土磁性纳米微球Rare earth permanent magnetis materials稀土永磁材料Rare American Chestnut Trees Discovered美国发现罕见的花生树rare earth magnetic substance multilayer稀土磁性物质多层膜

1. Some rare metals have radioactivity.
   某些稀有金属具有放射性。
2. Rare metal is indispensable for the aircraft industry.
   稀有金属是航空工业发展不可或缺的原材料。