将“preference scheme"翻译成中文

Existing preference schemes, including duty-free and quota-free access, have had mixed effects on the exports of African least developed countries.

现有的优惠方案包括免关税和免配额准入对非洲最不发达国家出口的影响有好有坏。

By comparison, the Generalized System of Preferences scheme by Canada for the least developed countries provides global cumulation of all Generalized System of Preferences beneficiaries.

相比之下,加拿大对最不发达国家的普惠制方案规定,所有普惠制的惠益可以全球累积。

Maldives had applied to join the European Union’s Generalized System of Preferences scheme, the eligibility criteria for which included ratification of 27 international conventions.

马尔代夫已经申请加入欧洲联盟普惠制计划,其资格标准包括批准27项国际公约。