In addition, the problems inherent in various Generalized System of Preferences schemes and other unilateral trade preferences had constrained the ability of the LDCs to continue benefiting from the new international trading system.
此外，各种普惠制制度以及其它单方面的贸易优惠固有的内在缺陷限制了它们从新的贸易新体系中获益的能力。