The restaurant was upgraded from three to four stars.这家餐馆从三星级升为四星级。The restaurant was awarded four stars for excellence.这家餐厅因其优秀品质被定为四星级餐厅。The hotel doesn't rate four stars.这家旅馆不够四星级。The food, as befits a four-star hotel, was excellent.食物很美味，不愧是四星级酒店。