energy'BNC²³⁶²¹³⁺¹ 例句 “They're all around you, ” says Karl Gschneidner, a senior metallurgist with the Department of Energy' s Ames Laboratory in Ames, Iowa, who has studied rare earth elements for more than50 years. 爱荷华州埃姆斯市埃姆斯实验室能源部的高级冶金专家卡尔·G Karl Gschneidner说，“稀土在你周围到处都是”，卡尔研究稀土有50多年了。 yeeyan