高盛：维持2025年年底铜价预测为每吨9700美元，2026年和2027年的年度平均价格分别为每吨10,000美元和10,750美元。

Group 1 - Goldman Sachs maintains its copper price forecast for the end of 2025 at $9,700 per ton [1] - The annual average copper prices for 2026 and 2027 are projected to be $10,000 and $10,750 per ton, respectively [1]