将“preference margin"翻译成中文

The commodities trade crisis should be considered within the agricultural framework, including tariff escalation, temporary protection of preference margins and elimination of non-tariff barriers.

应在农业框架内考虑商品贸易危机,其中包括关税升级、暂时性的优惠差额保护,以及非关税壁垒的取消。