rare a.稀罕的,罕有的,珍奇的,稀...zinc sulfide activated by rare earth metal 硫化锌...rare earth metal 稀土金属...rare earth element 稀土元素...rare refractory metal 难熔稀有金属...rare noble metal 稀有贵金属...be of rare occurrence 很少发生...rare-earth element 烯土元素...rare-earth salts 烯土盐...rare earth chloride 氯化稀土...rare earth fluoride 氟化稀土...on rare occasions 难得,不常,偶尔...rare short 局部短路...light rare earths 稀希土;稀希土元素...rare element 稀有元素...rare-earth metal 稀土金属...rare gas 稀有气体...rare earth 稀土元素...radioactive rare metal 放射性稀有金属...duty of rare 保管责任...rare precious metals 稀有贵金属...
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