例句:The idea that it is possible, let alone desirable, to allow multiple citizenship is relatively recent.
先不说允许多重国籍是否可取，它是否可行还是相对较新的概念。 

2.International law 国际法

例句:Independence and sovereign equality among states is a fundamental principle of international law.
国家的独立和主权平等，是国际法上的一项根本原则。 

3.think-tank 智囊团

例句:The persons interviewed were think-tank experts, officials, businessmen and women, journalists, cultural and religious leaders.
这些受访的人包括智囊团专家、政府官员、商人、新闻从业者、文化领袖和宗教领袖。

4.as well as 也；和...一样

例句:They visited some factories, hospitals as well as the school.
他们参观了这所学校，还参观了工厂和医院。