加a，例如：

1. In the year to August 2007, IKEA, a Swedish furniture chain, sold over one million kitchens worldwide.截至2007年8月，瑞典家具連鎖店宜家家居在世界范圍售掉超過(guò)100萬(wàn)個(gè)廚具。

2.A Swedish study compared the relationship between student performance and their mental health in later life.瑞典的一項(xiàng)研究比較了大學(xué)生的表現(xiàn)和心理健康兩者之間的關(guān)系。

3. There's actually a Swedish study about how you can train muscles to remember.有一項(xiàng)瑞典的研究有辦法幫助你訓(xùn)練肌肉。