higher-gradeCOCA¹⁴⁴⁹³⁷BNC²³⁶²¹³⁺¹ 基本例句 🌏较高级；高等 The U.S. government has dismissed the proposal which calls for Iran to ship some of its low- enriched uranium to Turkey in exchange for higher-grade fuel for a medical research reactor in Tehran. 美国政府拒绝了这项建议。 该建议要求伊朗将其部分低度浓缩铀运往土耳其，以换取德黑兰一医学研究核反应堆所需高等级燃料。 tingvoa