On Friday, about 500 Belgian businessmen have started their partners-seeking missions in five cities in China to strengthen bilateral economic and trade relations.

周五，约500名比利时商人在中国的五个城市开始了他们寻求合作伙伴的旅程，以加强双边经ó关系。

【解析】

在上述报导中，”economic and trade relations”用来表示“经ó关系”。”economic and trade”是“经济和ó易”的意思。“关系”一词除了用”relation”，还可以用”tie”。句中的”bilateral”意思是“双边的、双方的”，常用来表示两国之间的关系。

例句：

1.Bilateral economic and trade relations kept developing.
双边经ó关系持续发展。

2.The Central Government and relevant departments in Hong Kong are discussing the ways to tighten up trade relations between the two sides.
中央政府正在和香港的有关部门研究建立更紧密的ó易关系安排。

3.They are trying to seek closer trade ties with China.
他们谋求与中国建立更紧密的ó易关系。