Norway participates in the single market by joining the EEA, even though it's not an EU member.

EEA 是 European Economic Area（欧洲经济区）的缩写，指由欧盟成员国和欧洲自由贸易联盟（EFTA）部分成员国组成的共同市场，旨在实现商品、服务、资本和人员的自由流动。