They largely involve re - versing emergency cuts in protection undertaken during the 2007-8 commodity price shock , when countries were trying to encourage the supply of food and raw materials .
它们主要涉及取消在2007-08年大宗商品价格冲击期间紧急调降关税的做法，当时各个国家都在努力鼓励食品和原材料供给。
versing