Question:As a non immigration country,it is quite unusual for Germany to offer foreign experts this opportunity for an overseas working experience.And the rules concerning Green Card program have come into effect,but for what reasons?

• 问：德国是个非移民国家，所以它向外国专家提供海外工作机会是很不寻常的，而且有关绿卡计划的法规已生效。这是出于何原因呢?