When the financial crisis hammered Portugal's economy, hundreds of thousands of its people left,
当金融危机席卷葡萄牙经济时，数十万葡萄牙人离开了，
taking advantage of the European Union's rules on free movement to find work in countries that were hit less hard.
他们利用欧盟自由出入的规定在那些受经济危机打击较小的国家中找工作。
Now Portugal is welcoming older people going in the other direction, not for jobs but for a warm, cheap retirement.
现在葡萄牙以另一种方式欢迎老年人，不为工作而是为了一种温暖、廉价的退休政策。
Well-off baby-boomers are flocking to Lisbon, Sintra and the Algarve, drawn in part by Portugal's tax exemptions on foreign income.
在婴儿潮出生的人生活宽裕，他们涌入里斯本、辛特拉以及阿尔加维，被葡萄牙对海外收入的免税政策所吸引。
Under its non-habitual-residency scheme, pensions from abroad can be drawn tax-free for a decade.
在非常住税务居民计划下，来自海外的退休金可免除十年税收。
Bilateral double-taxation agreements are intended to ensure that income does not end up being taxed twice.
双边双重课税协议旨在确保收入不被二次征税。
But some countries, seeking to boost domestic demand by luring wealthy immigrants,
但是为了吸引富裕移民促进国内需求，
have arranged matters so that they can avoid paying any tax on income earned outside their country of residence, such as pensions, capital gains and rent.
一些国家做好了一切安排，让那些富裕的移民可以避免为来自居住国之外的收入上缴任何税，比如养老金、资本收益及租金。