短語(yǔ)詞組短語(yǔ)fuel high burn -up 高度燃耗燃料Fuel assemblies burn -up 組件燃耗ultimate fuel burn -up 最終燃料消耗fuel -assembly burn-up 燃料組件燃耗extent of fuel burn -up 燃料燃耗深度 返回 fuel burn-up