语法 Oil ministers say they believe an agreement can be reached that will strengthen the oil market

石油部长们说他们相信能够达成一项提振石油市场的协议。
that will strengthen the oil market是修饰an agreement的定语从句。

Oil ministers say they believe an agreement can be reached that will strengthen the oil market.
石油部长们说他们相信他们最终会达成共识以优化石油市场。

that will strengthen the oil market 形容agreement
即 an agreement that will strengthen the oil market，宾语从句

恩，似乎 heracer 的答案更好...
是定语从句?!我刚才瞎猜的...