bloc

几个国家组成了贸易集团以降低关税壁垒。

Several countries formed a trade ___bloc to reduce tariff barriers.

这些国家组成了一个集团以增强谈判实力。

These countries formed a ___bloc to strengthen their bargaining power.

这些国家组成了一个经济联盟来促进贸易合作。

These countries formed an economic ___bloc to promote trade cooperation.