In the early 1970s,the world trading system was being progressively liberalised under the aegis of GATT, with quantitative restrictions being phased out and tariffs being steadily reduced.

• 20世纪六、七十年代，在关税和贸易总协定组织的主持下，世界贸易体制逐步自由化，数量限制逐步取消，关税也稳定地降低。