partner; companion; colleage; co-worker in shop; mate: 二次世界大战以来, 美国一直是日本的主要贸易伙伴。 Ever since World WarⅡthe United States has been Japan's principal trade partner. 我妹妹是同我一同散步的伙伴。 My sister was the partner of my walks.
These nouns all denote one who is united or associated with another, as in a venture or relationship. A partner participates in a relationship in which each member has equal status: