VOA慢速英语:US Student on 'Budget' Tour Held in N. Korea

短语讲解：

1. The U.S. State Department has, for years, issued strong recommendations and travel warnings against visiting North Korea because of the risk of arrest and longterm detention.

because of 因为，由于
例句：All the planes were socked in yesterday because of the thick mist.
由于雾大，昨天所有的飞机都停飞了。

2. Many of the North Americans arrested by North Korea in recent years have had links to Christian Evangelical groups.

link to 与…连接， 联系
例句：Bonus payment is link to productivity.
奖金与生产率挂钩。