二是深化铜资源合作，实现互利双赢。
第二，深化经贸合作，实现互利双赢。
Second, to deepen economic and trade cooperation and realize mutual benefits.
坚持互惠互利，深化经济合作。
Second, to adhere to mutual benefits and deepen economic cooperation.
坚持互惠互利，深化经济合作。
Second, to adhere to mutual benefits and deepen economic cooperation.
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