According to a report by the World Resources Institute,half of all the chemical fertilizers ever produced (use) since 1984.
根据世界资源研究所的报告,曾经被生产的一半的化肥自1984年以来已经被使用.
记住:produced 是过去分词作后置定语,它和ever一起修饰前面的fertilizers,而have been used是真正的谓语.
According to a report by the World Resources Institute,half of all the chemical fertilizers ever produced (use) since 1984.
根据世界资源研究所的报告,曾经被生产的一半的化肥自1984年以来已经被使用.
记住:produced 是过去分词作后置定语,它和ever一起修饰前面的fertilizers,而have been used是真正的谓语.