(also ˌtrades ˈunionunion) noun [C] an organization for people who all do the same type of work. Trade unions try to get better pay and working conditions for their members. 工会
trade windˈtrade wind
noun [C] a strong wind that blows all the time towards the EQUATOR (= the imagined line around the middle of the earth) and then to the west 贸易风；信风