The World Trade Organization (WTO) will rule later on the biggest trade dispute in its history - between aircraft manufacturers Boeing and Airbus.

世贸组织将会处理一起有史以来最大的贸易纠纷——飞机制造商波音和空中巴士。

Airbus believes it has a "very good case"

The US has accused the EU of handing out illegal subsidies¹（补助金，津贴） to Airbus, and the WTO is widely expected to agree.

However, the EU has made a counter claim against the US for its support of Boeing. A ruling on that claim is due in the next six months.

The WTO's ruling will come after five years of deliberations（考虑，细想）.

Experts say its decision will set the boundaries for acceptable government funding in civil aviation（民用航空）.

Louis Gallois, the chief executive of Airbus's parent company EADS, has said he believes the company has a "very good case".